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《Acta Agrestia Sinica》 2005-01
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Effect of Water Supply on the Growth and Seed Yield of White Clover

YAN Min~1, ZHANG Ying-jun~(1*), HAN Jian-guo~1, GENG Wen-cheng~2, YANG Shi-lin~3 (1.Institute of Grassland Science, China Agricultural University, Beijing 100094, China; 2. Yunnan Stud-stock Farm, Xundian County, Yunnan Province 655205, China; 3. Grassland and Feed Management Section, Kunming , Yunnan Province, 650225, China)  
A study of the effect of irrigation to the growth of white clover shows that different water treatments influence the growth of the plant at various degrees. Water-stress treatments lead to lengthening of the plant growth period, diminishing of the canopy height, stolon density, and the leaf size, while increasing the number of reproductive nodes, the ratio of stem to leaf, and the seed yield. The heavier the water stress, the thinner is the stolon density and the more numerous are the reproductive nodes. Under all the five treatments that are adopted, the accumulated aboveground dry matter increases and grows curly in the shape of the letter "S". With increasing water stress, the accumulation of the aboveground dry matter gradually slows down. Contrary to the aboveground dry matter, the underground dry matter accumulates in a different trend. The lesser the soil water content, the higher the percentage of flowerheads per unit area. With the control, the percentage of flowerheads at harvest time reaches 22.72% of the total dry matter. Under the treatment of light or medium water stress, the percentage of leaf diminishes to 21.76% or 19.85% of the total, while the seed yield increases to 44.97 g/m~2 or 43.62 g/m~2 respectively.
【Fund】: 云南省校省院合作项目“云南省牧草种子繁育关键技术及其产业化”(2003FCBFE00A002)
【CateGory Index】: S54
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