稻田不同水旱复种模式对土壤团聚体及碳氮的影响

吕晴晴; 劳丞一; 徐慧芳; 黄国勤

doi:10.7671/j.issn.1001-411X.202407015

稻田不同水旱复种模式对土壤团聚体及碳氮的影响

Effects of different paddy-upland multiple cropping patterns on soil aggregates, carbon and nitrogen in paddy fields

摘要

摘要:
目的探寻更适合南方稻田可持续发展的水旱复种模式。
方法在江西农业大学科技园开展紫云英−早稻−晚稻(CK)、紫云英−早稻−晚玉米||晚大豆(CRI)、油菜−早稻−晚玉米||晚大豆(RRI)、油菜−早稻−晚稻(RRR)水旱复种模式的田间对比试验。
结果土壤有机碳、全氮含量均为CK>RRR>CRI>RRI。种植紫云英模式的R_0.250(粒径≥0.250 mm的团聚体含量)比种植油菜模式的高，土壤结构的稳定性更强。CRI的早稻产量高于其他处理。
结论在南方地区推行紫云英−早稻−晚玉米||晚大豆种植模式(CRI)，有利于农业的可持续发展。

Abstract:
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 R_0.250 (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.

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