| 保护性耕作对黄土高原旱地表土容重和水分入渗的影响 |
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| 引用本文： | 罗珠珠,黄高宝,张国盛.保护性耕作对黄土高原旱地表土容重和水分入渗的影响[J].干旱地区农业研究,2005,23(4):7-11. |
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| 作者姓名： | 罗珠珠 黄高宝 张国盛 |
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| 作者单位： | 1. 甘肃农业大学农学院,甘肃,兰州,730070
2. 甘肃农业大学资源环境学院,甘肃,兰州,730070 |
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| 基金项目： | 中澳合作项目ACIAR“提高甘肃黄土高原西部雨养农业系统生产力及其可持续性的研究”(LWR2/1999/094) |
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| 摘 要： | 通过在陇中黄土高原半干旱区进行保护性耕作的定位研究,探讨了保护性耕作对土壤容重以及渗透性能的影响。结果表明:与传统耕作(T)、免耕无覆盖(NT)、传统耕作结合秸秆还田(TS)相比,试验的前2～3a免耕覆盖(NTS)使得土壤容重增大,而后保持稳定状态不再持续增加。通过对渗吸率、宏观毛管长度、有效孔径以及饱和导水率等指标的比较发现,免耕覆盖(NTS)对土壤的渗透性能有显著的改善作用。
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| 关 键 词： | 保护性耕作 黄土高原 土壤容重 土壤渗吸率 土壤饱和导水率 |
| 文章编号： | 1000-7601(2005)04-0007-05 |
Effects of conservation tillage on bulk density and water infiltration of surface soil in semi-arid area of west Loess Plateau |
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| LUO Zhu-zhu,HUANG Gao-bao,ZHANG Guo-sheng.Effects of conservation tillage on bulk density and water infiltration of surface soil in semi-arid area of west Loess Plateau[J].Agricultural Research in the Arid Areas,2005,23(4):7-11. |
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| Authors: | LUO Zhu-zhu HUANG Gao-bao ZHANG Guo-sheng |
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| Institution: | LUO Zhu-zhu~1,HUANG Gao-bao~1,ZHANG Guo-sheng~2 |
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| Abstract: | A study of conservation tillage was conducted in the semi-arid area of west Loess Plateau in Gansu province. The results showed that soil bulk density could be increased in the initial stage, but became steady in the later years under the treatment of no-till with straw mulching compared to conventional tillage, conventional tillage with straw returning and no-till with no straw mulching. By comparing sorptivity,macroscopic capillary length, mean pore diameter and saturated hydraulic conductivity, it was indicated that no-till with straw mulching could improve water infiltration significantly. |
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| Keywords: | conservation tillage Loess Plateau soil bulk density soil sorptivity soil saturated hydraulic conductivity |
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