| 灌溉量对科尔沁沙地紫花苜蓿土壤速效养分分布及淋失的影响 |
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| 引用本文： | 李天琦,林志玲,卢轩,黄佳媛,杨宁,沃野,高凯,柳小妮,王显国. 灌溉量对科尔沁沙地紫花苜蓿土壤速效养分分布及淋失的影响[J]. 草地学报, 2021, 29(7): 1454-1461. DOI: 10.11733/j.issn.1007-0435.2021.07.010 |
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| 作者姓名： | 李天琦 林志玲 卢轩 黄佳媛 杨宁 沃野 高凯 柳小妮 王显国 |
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| 作者单位： | 1. 内蒙古民族大学农学院, 内蒙古 通辽 028042;2. 甘肃农业大学草业学院, 甘肃 兰州 730070;3. 中国农业大学草业科学与技术学院, 北京 100083 |
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| 基金项目： | 草原英才滚动支持（CYYC20005）；内蒙古自治区科技储备项目（2018MDCB03）资助 |
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| 摘 要： | 为探讨科尔沁沙地紫花苜蓿(Medicago sativ a L.)适宜灌溉量,本研究以指针式喷灌机下建植两年紫花苜蓿为试验材料,根据联合国粮农组织推荐的Penman-Monteith方法,以日为步长计算紫花苜蓿实际需水量(ETc),并基于ETc设置4个灌溉水平W1(60％ETc),W2(80％ETc),W3(100％E...
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| 关 键 词： | 紫花苜蓿 灌溉量 速效养分 淋失量 残留量 |
| 收稿时间： | 2020-10-29 |
Effects of Irrigation Amount on Soil Available Nutrient Distribution and Leaching Loss of Alfalfa in Horqin Sandy Land |
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| LI Tian-qi,LIN Zhi-ling,LU Xuan,HUANG Jia-yuan,YANG Ning,WO Ye,GAO Kai,LIU Xiao-ni,WANG Xian-guo. Effects of Irrigation Amount on Soil Available Nutrient Distribution and Leaching Loss of Alfalfa in Horqin Sandy Land[J]. Acta Agrestia Sinica, 2021, 29(7): 1454-1461. DOI: 10.11733/j.issn.1007-0435.2021.07.010 |
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| Authors: | LI Tian-qi LIN Zhi-ling LU Xuan HUANG Jia-yuan YANG Ning WO Ye GAO Kai LIU Xiao-ni WANG Xian-guo |
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| Affiliation: | 1. College of Agronomy, Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028042, China;2. College of Pratacultural Science, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;3. College of Grass Science and Technology, China Agricultural University, Beijing 100083, China |
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| Abstract: | The purpose of this study was to research the suitable irrigation amount of alfalfa in Horqin sandy land. Alfalfa planted under the pointer-type sprinkler for two years was experiment material. According to the Penman-Monteith method recommended by the FAO,the actual water demand (ETc) of alfalfa was calculated in daily steps. The effects of different irrigation amount on alfalfa yield and water use efficiency in Horqin sandy land were studied based on the four irrigation levels of W1(60% ETc),W2(80% ETc),W3(100% ETc) and W4(120% ETc). The results showed that the profile distribution of available nutrients in soil was significantly affected by different irrigation quantities,and the accumulation peaks of alkaline nitrogen and available potassium were obvious. The residues of alkaline nitrogen and available potassium gradually decreased with the increase of irrigation amount. The residues of alkaline nitrogen and available potassium were the highest under W1 treatment. The leaching loss of alkaline nitrogen and available potassium gradually increased with the increase of irrigation amount. The leaching loss of alkaline nitrogen and available potassium was the largest under W4 treatment,and the available phosphorus was the largest under W2 treatment. 100% ETc irrigation level is recommended for irrigation during the growth period. |
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| Keywords: | Alfalfa Irrigation quantity Available nutrients Leaching loss Residue |
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