华南农业大学学报2017，Vol.38Issue(1)：38-43,6.DOI:10.7671/j.issn.1001-411X.2017.01.007
开荒作物对后茬作物产量、杂草群落及土壤理化性质的影响
Effect of the pioneer crop on afterreap crop yield, weed community and soil physicochemical property
摘要
Abstract
Objective] To explore the mechanism of using sesame for cultivating wasteland in traditional agriculture land. [Method]Sesame was planted in the virgin land with red soil in the south area as the pioneer crop, the controls were Glycine max and Zea mays. The yield of afterreap crops, Raphanus sativus and Phaseolus coccineus, physicochemical characteristics of soils and changes of weeds were studied. [Result]The yield of R. sativus and P. coccineus increased, and the increase rate was 44. 25%and 148. 48% respectively. The contents of organic C and available P, and pH in the soil increased. The contents of available N and available K decreased by 89. 93% and 47. 95% respectively. The dominant weed Saxifraga stolonifera in virgin land was not found after planting sesame, but Amaranthus blitum and Bidens pilosa became dominant. The species and biomass of weeds were affected by afterreap, and there were significant differences of weed species between sesame-radish(11. 67 species) or sesame-P. vulgaris (10 species) and sesame-natural grass(5. 67 species) . Compared with grass-grass, the number of weed species of sesame-grass treatment increased from 4 to 5. 67 species, but biomass reduced from 2 698. 6 to 944. 13 g·m-2 . [Conclusion] Sesame,which can enhance afterreap crop yield and inhibit weed growth, is suitable for cultivating wasteland. The fact that the litter and stubble from sesame are easily decomposed can increase organic C and available P contents in soil as well as afterreap crop yield.关键词
芝麻/荒地/土壤理化性质/后茬作物/杂草Key words
sesame/wasteland/soil physicochemical property/afterreap crop/weed分类
农业科技引用本文复制引用
钱久李,秦俊豪,黎华寿..开荒作物对后茬作物产量、杂草群落及土壤理化性质的影响[J].华南农业大学学报,2017,38(1):38-43,6.基金项目
973项目(2011CB100400-G) （2011CB100400-G）
广东省科技计划项目(2015A020224006,2015B090903077) （2015A020224006,2015B090903077）
广东省教育厅科研项目(2013CXZDA007) （2013CXZDA007）
