稻田不同水旱复种模式对土壤团聚体及碳氮的影响OA北大核心CSTPCD

[Objective]To investigate a paddy-upland multiple cropping model that is more conducive to the sustainable development of paddy fields in the southern region.[Method]A comparative field trial was conducted at the Science and Technology Park of Jiangxi Agricultural University to compare the paddy-upland multiple cropping models,including milk vetch-early rice-late rice(CK),milk vetch-early rice-late corn||late soybean(CRI),rape-early rice-late corn||late soybean(RRI),and rape-early rice-late rice(RRR).[Result]The levels of soil organic carbon and total nitrogen contents were both in the order of CK>RRR>CRI>RRI.In addition,The R0.250(content of aggregate with diameter≥0.250 mm)values of planting milk vetch modes were higher than those of planting rape modes,the soil structures of planting milk vetch modes were more stable.Furthermore,the early rice yield of CRI mode was the highest among four treatments.[Conclusion]Adopting CRI mode of milk vetch-early rice-late corn||late soybean in the southern region is beneficial for the sustainable development of agriculture.