| 模拟降雨量条件下沟垄集雨种植对土壤养分分布及夏玉米根系生长的影响 |
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| 引用本文： | 任小龙,贾志宽,陈小莉,韩娟,韩清芳.模拟降雨量条件下沟垄集雨种植对土壤养分分布及夏玉米根系生长的影响[J].农业工程学报,2007,23(12):94-99. |
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| 作者姓名： | 任小龙 贾志宽 陈小莉 韩娟 韩清芳 |
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| 作者单位： | 1. 西北农林科技大学干旱半干旱农业研究中心,杨凌,712100
2. 中国科学院水土保持研究所,杨凌,712100 |
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| 摘 要： | 为了探索沟垄集雨种植的增产机理及其适宜的雨量范围，在人工模拟降雨条件下研究了不同降雨量沟垄集雨种植对夏玉米（ZeaMaysL．）根系性状及土壤速效养分含量的影响。结果表明，沟垄集雨种植处理后，耕层（0~40cm）土壤速效N、P、K和有机质的含量明显增加（P〈0．05）。夏玉米根长、根表面积、根体积和根干重在230mm和340mm降雨量下明显增加，440mm雨量下，分别有所减小（P〈0．05）；籽粒产量增加幅度在230~440mm雨量下随雨量增大而减小（P〈0．05），440mm时增产效果已不明显。可见，沟垄集雨种植协调了土壤水分和养分的关系，在一定雨量下可促进植株根系的发育，其种植玉米适宜的雨量上限可能在全生育期降雨量440mm左右。
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| 关 键 词： | 雨量 集雨种植 根系性状 速效养分 玉米 |
| 文章编号： | 1002-6819（2007）12-0094-06 |
| 收稿时间： | 2007-04-29 |
| 修稿时间： | 2007-10-15 |
Effect of ridge and furrow planting of rainfall harvesting on soil available nutrient distribution and root growth of summer corn under simulated rainfall conditions |
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| Ren Xiaolong,Jia Zhikuan,Chen Xiaoli,Han Juan and Han Qingfang.Effect of ridge and furrow planting of rainfall harvesting on soil available nutrient distribution and root growth of summer corn under simulated rainfall conditions[J].Transactions of the Chinese Society of Agricultural Engineering,2007,23(12):94-99. |
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| Authors: | Ren Xiaolong Jia Zhikuan Chen Xiaoli Han Juan and Han Qingfang |
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| Institution: | Research Center of Agriculture in the Arid and Semiarid Areas, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China;Research Center of Agriculture in the Arid and Semiarid Areas, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China;Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China;Research Center of Agriculture in the Arid and Semiarid Areas, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China;Research Center of Agriculture in the Arid and Semiarid Areas, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China |
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| Abstract: | Under different simulated rainfalls the root properties and soil available nutrient for summer corn with ridge and furrow planting of rainfall harvesting(RFPRH) were studied to investigate yield increase mechanism and fitting rainfall of RFPRH system.The results showed that contents of available N,P and K in topsoil(0~40 cm) treated with RFPRH increased significantly(p<0.05).Under 230 mm and 340 mm,the root length,root superficial,root volume and root dry matter weight significantly increased,while under 440 mm the corresponding value decreased respectively(p<0.05).And the increase of seed yield decreased with rainfall increase in 230~440 mm(p<0.05).And the effect of yield increase wasn't significant at 440 mm.Therefore,the application of RFPRH can not only improve the relationship of soil water and nutrient but also the root growth of plant at fitting rainfall.Under this planting pattern,the fitting max rainfall for planting maize could be about 440 mm during the whole growth stages. |
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| Keywords: | rainfall planting of rainfall harvesting roots characteristics available nutrient maize |
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