| 灌溉与施氮对紫花苜蓿土壤水分动态和耗水强度的影响 |
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| 引用本文： | 王田涛,师尚礼,张恩和,王琦,尹辉,俞华林.灌溉与施氮对紫花苜蓿土壤水分动态和耗水强度的影响[J].草原与草坪,2011,31(1):1-7. |
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| 作者姓名： | 王田涛 师尚礼 张恩和 王琦 尹辉 俞华林 |
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| 作者单位： | 王田涛,师尚礼,尹辉,WANG Tian-tao,SHI Shang-li,YIN Hui(甘肃农业大学,草业学院/草业生态系统教育部重点实验室/中-美草地畜牧业可持续发展研究中心,甘肃,兰州,730070);张恩和,俞华林,ZHANG En-he,YU Hua-lin(甘肃农业大学农学院,甘肃,兰州,730070);王琦,WANG Qi(甘肃农业大学,草业学院/草业生态系统教育部重点实验室/中-美草地畜牧业可持续发展研究中心,甘肃,兰州,730070;中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室和青藏高原冰冻圈观测试验研究站,甘肃,兰州,730000) |
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| 基金项目： | 农业部公益性行业(农业)专项 |
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| 摘 要： | 在甘肃省河西绿洲灌区设计大田试验,研究了不同灌溉量常规灌溉(330 mm)、节水20%灌溉(264 mm)和节水40%灌溉(198 mm)和施氮量0、40、80和120 kg/hm2对紫花苜蓿(Medicago sativa)土壤不同层次含水量、贮水量动态变化和耗水强度的影响.结果表明:根系层(0～120 cm)土壤含...
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| 关 键 词： | 灌溉 施氮 紫花苜蓿 土壤含水量 耗水强度 |
Effects of irrigation and nitrogen supply levels on soil moisture dynamics and water consumption rate of Medicago sativa |
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| WANG Tian-tao,SHI Shang-li,ZHANG En-he,WANG Qi,YIN Hui,YU Hua-lin.Effects of irrigation and nitrogen supply levels on soil moisture dynamics and water consumption rate of Medicago sativa[J].Grassland and Turf,2011,31(1):1-7. |
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| Authors: | WANG Tian-tao SHI Shang-li ZHANG En-he WANG Qi YIN Hui YU Hua-lin |
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| Institution: | 1.College of Grassland Sciecne,Gansu Agricultural University,Lanzhou,730070;2.College of Agronomy,Gansu Agricultural University,Lanzhou 730070,China;3.Cold and Arid Region Environmental and Engineering Research Institute,Chinese Academy of Science,Lanzhou 73000,China) |
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| Abstract: | A controlled study of irrigation and nitrogen(N)was conducted in Hexi oasis to investigate the effects of different irrigation and N supply levels on changes of soil water content,dynamic of soil water storage and water consumption rate of Medicago sativa at different growth stages.A complete randomized block split-plot design was employed,with irrigation regimes(conventional irrigation(330 mm),20% water-saving irrigation(264 mm),40% water-saving irrigation(198 mm)and N fertilizer application rates(0,40,80,120 kg N/hm2)as the main-plot and split-plot,respectively.The results show that soil water content of root depth(0～120 cm)was increased with the amount of irrigation.The treatment with a N rate of 80 kg/hm2 enhanced the soil water content in 0～40 cm depth,and the N supply had no effect on soil water content in 60～120 cm depth.Soil water storage was increased with amount of irrigation,and then declined sharply with the high evaporation,especial for treatment with high amount of irrigation.The water consumption rate was the lowest from seeding to branching stage of Medicago sativa,while it was the highest from budding to flowering stage.The water consumption rate of Medicago sativa was increased with amount of irrigation;N supply had no obvious effect on water consumption rate. |
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| Keywords: | irrigation nitrogen Medicago sativa soil water content water consumption rate |
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