期刊
JOURNAL OF AGRONOMY AND CROP SCIENCE
卷 189, 期 4, 页码 233-241出版社
BLACKWELL VERLAG GMBH
DOI: 10.1046/j.1439-037X.2003.00029.x
关键词
population density, frequency and diversity; surface cover; weeds
类别
The crop system implemented on organic farms requires that crop residues are incorporated into the soil following the end of wheat cultivation. This system leads to a reduction in soil moisture and the creation of favourable conditions for the emergence of weeds. In contrast, covering the soil with 60% crop residues was found to maintain soil moisture and lead to a reduction in dry weed mass, population density and population frequency as well as a reduction in population diversity, regardless of the initial weed flora before the implementation of different soil tillage systems. Finally, an increase in the prevalence of broad-leafed weeds was observed as the level of soil cover increased.
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