| 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 |
| Key Words: conservative farming system weed of wheat field biodiversity |
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| Abstract: |
| 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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