| 苗琳,王立,黄高宝,罗珠珠,李登航.保护性耕作对旱地麦田土壤酶活性的影响[J].干旱地区农业研究,2009,27(1):6~11 |
| 保护性耕作对旱地麦田土壤酶活性的影响 |
| Effects of conservation tillage on soil enzymatic activities in rainfed wheat field |
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| DOI：10.7606/j.issn.1000-7601.2009.01.02 |
| 中文关键词: 保护性耕作 土壤酶活性 免耕 覆盖 |
| 英文关键词:conserv ation tillge soil enzymatic activities no-tillage straw covering |
| 基金项目:国家科技支撑计划资助项目(2006BAD15B06)； 国家自然基金(40771132/D0116)；中澳合作ACIAR资助项目(SMCN(LWR2)/1999/094)；甘肃省农牧厅资助项目(034046)；中国农村技术开发中心资助项目(0390993) |
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| 中文摘要: |
| 通过在陇中黄土高原半干旱区设置的田间定位试验,研究了5种保护性耕作措施与传统耕作方式对旱地麦田土壤酶活性的影响。结果表明:不同耕作处理下过氧化氢酶活性均随耕作层的加深而递减;脲酶、碱性磷酸酶、蔗糖酶活性表现为三种翻耕处理(T,TS,TP)随土层的加深呈先增加后降低的趋势,而三种免耕处理(NT,NTS,NTP)随土层的加深而递减;与传统耕作(T)相比,免耕秸秆覆盖处理(NTS)下过氧化氢酶活性升高11.74%,脲酶活性升高17.60%,碱性磷酸酶活性升高43.99%,蔗糖酶活性升高40.22%;另外,就产量表现而言,免耕秸秆覆盖(NTS)是传统耕作(T)的1.68倍,统计分析差异显著(P<0.05)。可见,在黄土高原西部旱农区实施免耕秸秆覆盖的保护性耕作措施,既有利于作物产量的提高,也可以改善耕层土壤酶活性。 |
| 英文摘要: |
| Based on conserv ation tillage experiment in Dingxi of Gansu， effects of conv entional tillage and five conservation tillage patterns， namely，conventional tillage(T )，conv entional tillage W ith st ubble incorpo-
rating(TS)，no till with no stubble(NT)，no till with stubble retention(N TS), conventional tillage w ith plastic
film mulching(TP) and no till w ith plastic film mulching(NTP) on soil enzy matic activities and grain yield in the rainfed farming system w ere studied. T he results show ed that soil Catalase activity w as reduced with the in-censement of soil depth. The activities of U rease，Alkaline phosphates and Invertase in T ,TS and TP treatments decreased from the soil profile of 0~5 cm to 5~ 10 cm and increased from 5~10 cm to 10~30 cm，while de-creased in NT，NTS and NTP treatments from soil surface to deep soil layers. Compared with T treat ment，NTS treat ment can improve Catalase, Alkaline phosphatase and Invertase by 11.7%，17.60% and 43.99%, respectively. For grain yield, it is the highest in NTS treatment，being 1.68 times higher than that in T treat-
ment . Therefore， no till w ith st ubble ret ention w ould not only improve grain yield, but also can improve soil en-zymatic activities. |
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