| 方日尧,赵慧清,方娟.不同保护性耕作下冬小麦田杂草滋生情况调查研究[J].干旱地区农业研究,2008,(5):90~93 |
| 不同保护性耕作下冬小麦田杂草滋生情况调查研究 |
| The investigation of weeds growing situation in different conservative farming system in the winter wheat fields |
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| DOI：10.7606/j.issn.1000-7601.2008.05.19 |
| 中文关键词: 保护性耕作 小麦田间杂草 生物多样性 |
| 英文关键词:conservative farming system weed of wheat field biodiversity |
| 基金项目:农业部948项日201052(A)； 陕西省自然科学基金资助项目(2004D03) |
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| 中文摘要: |
| 采用随机调查的方法，对不同保护性耕作处理下冬小麦田间杂草的种类和数量进行调查研究，发现不同的耕作处理对杂草种类和数量的消长有很大的影响。传统耕作、免耕、秸秆深松覆盖、高留茬深松覆盖四种处理，以免耕条件下杂草的种类和数量最多，秸秆深松覆盖、高留茬深松覆盖是控制冬小麦田间杂草滋生的一种有效措施。不同保护性耕作处理使冬小麦田间杂草种类与各杂草相对丰度均发生变化，各处理间Shannon多样性指数(H′)和Mamclef物种丰富度指数(D）均存在差异，其原因可能是由于不同保护性耕作处理造成各处理间生态环境、土壤养分和土壤水分的不同，各种杂草的生长因而受其不同影响所致。 |
| 英文摘要: |
| Based on the investigation of random block, investigation and study on weeds kinds and their quantity were conducted in the winter wheat fields under different conservative farming systems. The results showed that the dynamic of increasing and declining on weed species and number was affected significantly by various tilling systems. Among four treatments, fallowing, mulching of leaving high stubble, sub soiling tillage and sub soiling tilling with mulching, the weeds species and number showed a maximal number in the system of fallowing, while mulching of leaving high stubble sub soiling tillage and sub soiling tilling mulching would be favor for controlling and inhibiting weeds growth and their widespread. Under different conservative farming systems, the species and relative abundance of weeds were changed and the diversity indices of Shannon's H and Margalef's DMG were different. It is due to ecological environment, amount of available soil nutrients and water of available soil that may have different impacts on the growth of different weeds. |
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