Use of plant water relations to assess forage quality and growth for two cultivars of Napier grass (Pennisetum purpureum) subjected to different levels of soil water supply and temperature regimes
S. W. Mwendia A C , I. A. M. Yunusa A , R. D. B. Whalley A , B. M. Sindel A , D. Kenney A and I. W. Kariuki B
+ Author Affiliations
- Author Affiliations
A School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia.
B Kenya Agricultural Research Institute, Muguga South, 30148-00100, Nairobi, Kenya.
C Corresponding author. Email: smwendia@myune.edu.au
Crop and Pasture Science 64(10) 1008-1019 https://doi.org/10.1071/CP13254
Submitted: 23 April 2013 Accepted: 21 November 2013 Published: 13 December 2013
Abstract
Napier grass (Pennisetum purpureum Schumach.) is an important fodder and relatively drought-tolerant crop in tropical and subtropical regions, especially in developing countries. For this and other species, tools are needed for identifying drought-tolerant cultivars to aid selection for semi-arid environments. We determined tissue water status, carbon assimilation, biomass yield and forage quality for Napier grass cvv. Bana and Atherton grown in bins and subjected to three soil-water supply levels (100, 50 or 25% of field capacity) in glasshouses set at either low (15−25°C) or high (25−35°C) temperature regimes, over three growing cycles. Our aim was to explore whether differences in leaf water potential (LWP) and carbon assimilation rates could be reliable indicators of the relative yield potential and forage quality of the two cultivars in environments prone to water and heat stresses.
At the low soil-water supply of 25% and low temperature, Bana had lower (more negative) LWP and relative water content (RWC) than Atherton, while at 50% and 100% soil-water supply, Bana had a higher tissue water status. Under the high temperature regime, Bana had consistently more positive LWP and RWC than Atherton, but the differences were not significant. The two cultivars had a similar CO2 assimilation rate (A) and there were no significant differences in the total dry matter yields over the three growing cycles. Water-use efficiency for above-ground biomass (kg ha–1 mm–1) was similar for both cultivars and was 28.5–35.1 under the low temperature regime and 16.9–22.9 under the high temperature regime. Neutral detergent fibre (NDF) was often higher for Bana at low water supply and low temperature than for Atherton, but the trend was reversed under the high temperature regime. Digestibility was generally improved under water-stressed conditions, and there was a positive correlation between NDF and both LWP and RWC measured at midday, but only under the low temperature regime. We conclude that LWP, RWC and A, alone or together, are inadequate for selecting cultivars for dry and hot environments, because cultivars may differ in other mechanistic responses to water stress and high temperatures.
Additional keywords: dry matter yield, leaf area, root : shoot ratio, water-use, water-use efficiency.
References
Akin DE, Kimball BA, Mauney JR, LaMorte RL, Hendrey GR, Lewin K, Nagy J, Gates RN (1994) Influence of enhanced CO2 concentration and irrigation on sudangrass digestibility. Agricultural and Forest Meteorology 70, 279–287.| Influence of enhanced CO2 concentration and irrigation on sudangrass digestibility.Crossref | GoogleScholarGoogle Scholar |
Anindo DO, Potter HL (1994) Seasonal variation in productivity and nutritive value of Napier grass at Muguga, Kenya. East Africa Agriculture and Forestry Journal 59, 177–185.
AOAC (1975) ‘Official methods of analysis.’ 12th edn (Association of Official Agricultural Chemists: Washington, DC)
Barrs HD (1968) Determination of water deficits in plant tissue. In ‘Water deficit and plant growth’. (Ed. TT Kozlowski) pp. 235–368. (Academic Press: New York)
Esilaba AO, Muturi GM, Cheruiyot HK, Okoti M, Nyariki DM, Keya GA, Miriti JM, Kigomo JN, Olukoye G, Wekesa L (2011) The desert margins programme approaches in upscaling best-bet technologies in arid and semi-arid lands in Kenya. In ‘Innovations as key to the green revolution in Africa’. (Eds A Bationo, B Waswa, J Okeyo, FM Maina) pp. 1177–1191. (Springer Science: New York)
Fernández RJ, Reynolds JF (2000) Potential growth and drought tolerance of eight desert grasses: lack of trade off? Oeocologia 123, 90–98.
| Potential growth and drought tolerance of eight desert grasses: lack of trade off?Crossref | GoogleScholarGoogle Scholar |
Ford CW, Morrison IM, Wilson JR (1979) Temperature effects on lignin, hemicellulose and cellulose in tropical and temperate grasses. Australian Journal of Agricultural Research 30, 621–633.
| Temperature effects on lignin, hemicellulose and cellulose in tropical and temperate grasses.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaE1MXlsFCgs7o%3D&md5=fd7a617008d694e2f2c8f510eb63e1c7CAS |
Givens DI, Owen E, Axford RFE, Omed HM (2000) ‘Forage evaluation in ruminant nutrition.’ (CABI Publishing: Wallingford, UK)
Greenwood KL, Mundy GN, Kelly KB (2008) On-farm measurement of the water use and productivity of maize. Australian Journal of Experimental Agriculture 48, 274–284.
| On-farm measurement of the water use and productivity of maize.Crossref | GoogleScholarGoogle Scholar |
Guenni O, Marin D, Baruch Z (2002) Responses to drought of five Brachiaria species. Biomass production, leaf growth, root distribution, water use and forage quality. Plant and Soil 243, 229–241.
| Responses to drought of five Brachiaria species. Biomass production, leaf growth, root distribution, water use and forage quality.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XmsFWmt7g%3D&md5=9e35820a29180c368bc254a0aef0d95fCAS |
Halim HR, Buxton DR, Hattendorf MJ, Carlson RE (1989) Water-stress effects on alfalfa forage quality after adjustment for maturity differences. Agronomy Journal 81, 189–194.
| Water-stress effects on alfalfa forage quality after adjustment for maturity differences.Crossref | GoogleScholarGoogle Scholar |
Hatch MD (1992) ‘The making of the C4 pathway.’ (Kluwer Academic Publishers: Dordrecht, The Netherlands)
Karcher DE, Richard MD, Hignight K, Rush D (2008) Drought tolerance of tall fescue populations selected for high root/shoot ratios and summer survival. Crop Science 48, 771–777.
| Drought tolerance of tall fescue populations selected for high root/shoot ratios and summer survival.Crossref | GoogleScholarGoogle Scholar |
Klingebiel AA, Montgomery PH (1961) ‘Land capability classification.’ Agriculture Handbook No. 210. (US Department of Agriculture: Washington, DC)
Lambers H, Chapin FS, Pins TL (2008) ‘Plant physiological ecology.’ (Springer Science: New York)
Larcher W (2003) ‘Physiological plant ecology.’ (Springer-Verlag: Berlin, Heidelberg)
Ludlow MM, Fisher MJ, Wilson JR (1985) Stomatal adjustment to water deficits in three tropical grasses and a tropical legume in controlled conditions and in the field. Journal of Plant Physiology 12, 131–149.
McCuistion KC, Bean BW, McCollum FT (2010) Nutritional composition response to yield differences in brown midrib, non-brown midrib, and photoperiod sensitive forage sorghum cultivars. Forage and Grazinglands
| Nutritional composition response to yield differences in brown midrib, non-brown midrib, and photoperiod sensitive forage sorghum cultivars.Crossref | GoogleScholarGoogle Scholar |
Minitab Inc (2007) ‘Minitab statistical software, release 15 for windows.’ (Minitab Inc.: State College, PA, USA)
Monteith JL, Unsworth MH (2008) ‘Principles of environmental physics.’ 3rd edn (Elsevier Science: Amsterdam)
Moore KJ, Jung HG (2001) Lignin and fiber digestion. Journal of Range Management 54, 420–430.
| Lignin and fiber digestion.Crossref | GoogleScholarGoogle Scholar |
Neal JS, Fulkerson WJ, Sutton BG (2011) Differences in water-use efficiency among perennial forages used by the dairy industry under optimum and deficit irrigation. Irrigation Science 29, 213–232.
Neil KL, Tiller RL, Faeth SH (2003) Big sacaton and endophyte-infected Arizona fescue germination under water stress. Journal of Range Management 56, 616–622.
| Big sacaton and endophyte-infected Arizona fescue germination under water stress.Crossref | GoogleScholarGoogle Scholar |
Niklas KJ, Spats H (2012) Plant water relations. In ‘Plant physics’. (Eds M Koplow, NS Roche) pp. 71–97. (The University of Chicago Press: Chicago, IL)
Norris IB, Thomas H (1982) The effect of droughting on varieties and ecotypes of Lolium, Dactylis and Festuca. Journal of Applied Ecology 19, 881–889.
| The effect of droughting on varieties and ecotypes of Lolium, Dactylis and Festuca.Crossref | GoogleScholarGoogle Scholar |
Nyaata OZ, Dorward PT, Keatinge JDH, O’Neill MK (2000) Availability and use of dry season feed resources on smallholder dairy farms in central Kenya. Agroforestry Systems 50, 315–331.
| Availability and use of dry season feed resources on smallholder dairy farms in central Kenya.Crossref | GoogleScholarGoogle Scholar |
Nyambati EM, Lusweti CM, Muyekho FN, Mureithi JG (2011) Up-scaling Napier grass (Pennisetum purpureum Schum.) production using “Tumbukiza” method in smallholder farming systems in north western Kenya. Journal of Agricultural Extension and Rural Development 3, 1–7.
Qadir M, Noble AD, Chartres C (2013) Adapting to climate change by improving water productivity of soils in dry areas. Land Degradation & Development 24, 12–21.
| Adapting to climate change by improving water productivity of soils in dry areas.Crossref | GoogleScholarGoogle Scholar |
Rachmilevitch S, Lambers H, Huang B (2008) Short-term and long-term root respiratory acclimation to elevated temperatures associated with root thermotolerance for two Agrostis grass species. Journal of Experimental Botany 59, 3803–3809.
| Short-term and long-term root respiratory acclimation to elevated temperatures associated with root thermotolerance for two Agrostis grass species.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXhtlaltr3F&md5=f05295a3113f258ac046db8ff809aec2CAS | 18977747PubMed |
Scholander PE, Hammel HT, Bradstreet ED, Hemmingsen EA (1965) Sap pressure in vascular plants. Science 148, 339–346.
| Sap pressure in vascular plants.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BC3cvlsVKquw%3D%3D&md5=0e8ae85ccb6c666c372a850f335bf918CAS |
Sheaffer CC, Petersen PR, Hall MH, Stordahl JB (1992) Drought effects on yield and quality of perennial grasses in the North Central United States. Journal of Production Agriculture 5, 556–561.
| Drought effects on yield and quality of perennial grasses in the North Central United States.Crossref | GoogleScholarGoogle Scholar |
Singh KC, Rao AS (1996) Short note on water use and production potential of Lasiurus scindicus Henr. in the Thar desert of Rajasthan, India. Journal of Arid Environments 33, 261–262.
| Short note on water use and production potential of Lasiurus scindicus Henr. in the Thar desert of Rajasthan, India.Crossref | GoogleScholarGoogle Scholar |
Snyman HA (2009) Root studies on grass species in a semi-arid South Africa along a soil-water gradient. Agriculture, Ecosystems & Environment 131, 247–254.
| Root studies on grass species in a semi-arid South Africa along a soil-water gradient.Crossref | GoogleScholarGoogle Scholar |
Staal SJ, Chege L, Kenyanjui M, Kimari A, Lukuyu B, Njubi D, Owango M, Tanner J, Thorpe W, Wambugu M (1998) Characterisation of dairy systems supplying the Nairobi milk market: A pilot survey in Kiambu district for the identification of target producers. KARI/MoA/ILRI Collaborative Research Project Report. Available at: www.reading.ac.uk/ssc/media/ILRI_2006Nov/Publication/Full%20Text/Staal.pdf (accessed 14 August 2013).
Tudsri S, Jorgensen ST, Riddach P, Pookpakdi A (2002) Effects of cutting height and dry season closing date on yield and quality of five Napier grass cultivars in Thailand. Tropical Grasslands 36, 248–252.
Turner NC, Begg JE, Tonnet ML (1978) Osmotic adjustment of sorghum and sunflower crops in response to water deficits and its influence on the water potential at which stomata close. Australian Journal of Plant Physiology 5, 597–608.
| Osmotic adjustment of sorghum and sunflower crops in response to water deficits and its influence on the water potential at which stomata close.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaE1MXjtlyk&md5=3e794ab2ba98be6a0d5d0b88a5d574cbCAS |
Volaire F, Thomas H (1995) Effects of drought on water relations, mineral uptake, water-soluble carbohydrate accumulation and survival of two contrasting populations of cocksfoot (Dactylis glomerata L.). Annals of Botany 75, 513–524.
| Effects of drought on water relations, mineral uptake, water-soluble carbohydrate accumulation and survival of two contrasting populations of cocksfoot (Dactylis glomerata L.).Crossref | GoogleScholarGoogle Scholar |
Wahid A, Close TJ (2007) Expression of dehydrins under heat stress and their relationship with water relations of sugarcane leaves. Biologia Plantarum 51, 104–109.
| Expression of dehydrins under heat stress and their relationship with water relations of sugarcane leaves.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXksVegur8%3D&md5=45b57106e834d50414f5ae2d55552a90CAS |
Willard EE, Schuster JL (1973) Chemical composition of six Southern Great Plains grasses as related to season and precipitation. Journal of Range Management 26, 37–38.
| Chemical composition of six Southern Great Plains grasses as related to season and precipitation.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaE3sXhtVyitbw%3D&md5=b7aa5de6be89621ccdbc66abf2fca04cCAS |
Wilson JR (1983) Effects of water stress on in vitro dry matter digestibility and chemical composition of herbage of tropical pasture species. Australian Journal of Agricultural Research 34, 377–390.
| Effects of water stress on in vitro dry matter digestibility and chemical composition of herbage of tropical pasture species.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL3sXltlygur0%3D&md5=000e74a86c1e8684f1d7bd8a945e0e2dCAS |
Yordanov I, Velikova V, Tsonev T (2000) Plant responses to drought, acclimation, and stress tolerance. Photosynthetica 38, 171–186.
| Plant responses to drought, acclimation, and stress tolerance.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXptVehtr8%3D&md5=42766f4082c7ee1e1726282c519994f8CAS |
Yunusa IAM, Thomson SE, Pollock KP, Youwei L, Mead DJ (2005) Water potential and gas exchange did not reflect performance of Pinus radiata D. Don in an agroforestry system under conditions of soil-water deficit in a temperate environment. Plant and Soil 275, 195–206.
| Water potential and gas exchange did not reflect performance of Pinus radiata D. Don in an agroforestry system under conditions of soil-water deficit in a temperate environment.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXht1enurnP&md5=7575fb001b1eefdd8ea34ba8a63c0e59CAS |
Yunusa IAM, Zolfaghar S, Zeppel MJB, Li Z, Palmer AR, Eamus D (2012) Fine root biomass and its relationship to evapotranspiration in woody and grassy vegetation covers for ecological restoration of waste storage and mining landscapes. Ecosystems 15, 113–127.
| Fine root biomass and its relationship to evapotranspiration in woody and grassy vegetation covers for ecological restoration of waste storage and mining landscapes.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38Xhs1egsbo%3D&md5=aa131880b9fa242b651a105e81804245CAS |
Zhang J, Nguyen HT, Blum A (1999) Genetic analysis of osmotic adjustment in crop plants. Journal of Experimental Botany 50, 291–301.
Zhou Y, Lambrides C, Kearns R, Ye CR, Cao N, Fukai S (2009) Selecting for drought tolerance among Australian green couch grasses (Cynodon spp.). Crop & Pasture Science 60, 1175–1183.
| Selecting for drought tolerance among Australian green couch grasses (Cynodon spp.).Crossref | GoogleScholarGoogle Scholar |
