Water Stress Effects on Growth, Yield and Water Use Efficiency of Hemarthria Compressa

Abstract:

Water stress is an important approach to use water resources efficiently and remit the agricultural water shortage. Hemarthria compressa is one of perennial grasses, a pasture of high quality, which has abundant species resources in China. To explore the response of the growth, yield and water use efficiency(WUE) of Hemarthria compressa under water stress, this study, adapting pot experiment, imposed three water stress degree (LD, MD and SD) treatments and a control treatment on Hemarthria compressa. The data of growth indicators during control period, yield and total water consumption were obtained. The results show a noticeable inhibitory action of water stress on the growth of Hemarthria compressa. Along with the intensifying of water stress, plant height increment, leaf area, total biomass, dry matter of each organ and yield decreased, and the root-shoot ratio increased firstly and inclined to slump finally. Plants under the middle water stress treatment achieved the greatest WUE of 38.25 kg/m³. The first 10d in the water control period was the most sensitive period of the pasture responding to water stress.

• Periodical: Applied Mechanics and Materials (Volumes 212-213)
• Pages: 578-585
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.212-213.578
• Online since: October 2012
• Authors: Zhong Wen Yang, Jun Ying Jin, Xin Yi Xu
• Keywords: Growth, Hemarthria Compressa, Water Stress, Water Use Efficiency (WUE), Yield

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