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Details of the paper
| Title |
Effects of different crop rotation system on the characterization of soil weed seedbank |
| Author |
Shouhui Wei, Sheng Qiang, Bo Ma, Jiguang Wei |
| Keywords |
crop rotation, weed seedbank, relative abundance, species diversity, integrated weed management |
| Journal |
Chinese Journal of Ecology |
| Year,Vol,No |
2005,24(4) |
| Pages |
385-389 |
| Abstract |
Field studies were conducted to evaluate the effects of three different crop rotation systems, rice-wheat (RW), maize-wheat (MW) and soybean-wheat (SW) rotation, on the characterization of soil weed seedbank. The results showed that crop rotation significantly affects the density and species composition of weed seedbank. By rotation wheat with maize (MW) and soybean (SW) for 2 years, seedbank density decreased 27.16% and 44.44% respectively compared with RW. Major weed species in the soil seedbank under rice-wheat cropping were Lindernia procumbens, Cyperus difformis, Beckmannia syzigachne, Ammannia baccifera and Leptochloa chinensis. In MW, relative abundance (RA) of Digitaria sanguinalis, Cyperus iria and Fimbristylis dichotoma increased significantly, but the RA of Monochoria vaginalis, Ammannia baccifera, Beckmannia syzigachne decreased remarkably. While in SW, RA of Mazus japonicus, D. sanguinalis, Eclipta prostrata, F. dichotoma have shown marked increase. The species diversity of MW was higher than that of SW and RW. Based on the species similarity index of weed seedbank, the index between MW and SW was the highest. The reason why crop rotation affects the density and species composition of the weed seedbank is that the use of crop sequences diversify the selection pressure and prevent the proliferation of some weed species that has adapted well to a single cropping system. |
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2005 © Weed Research Laboratory,
Institute of Plant Protection, Chinese Academy of Agricultural Sciences
Address: No 2 West Yuanmingyuan Road, Haidian District, Beijing Postcode:
100094
Telephone: (010)62815937 Email: SHWEI@WSSC.ORG.CN
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