紫云英连续3年压青还田对福建稻区土壤肥力及水稻产量的影响

摘要: 为研究紫云英连续压青还田对福建稻区土壤肥力及水稻产量的影响, 在8个县开展3年定位试验。结果表明, 与基础土壤相比, 连续3年配合紫云英压青22 500kg·hm-2, 各试验区土壤有机质平均增幅15.8%, 容重下降8.7%, 均达极显著差异水平;土壤全氮、全磷、全钾、有效磷和速效钾分别增加18.4%、16.7%、9.5%、19.7%和70.5%;与常规施肥 (CK) 相比, 后季水稻有效穗和每穗实粒数显著增加, 水稻增产6.8%, 增产极显著。福建稻区连续种植翻压紫云英对土壤肥力及生产力提升明显, 应大面积推广。
- 紫云英 /
- 压青还田 /
- 土壤肥力 /
- 水稻产量
Abstract: By turning over the straws of Chinese milk vetch (Astragalus sinicus L.) after rice harvest to the paddy fields in Fujian in three consecutive years, the effects of the organic farming practice on the soil fertility and rice productivity were studied.The result showed that, as compared with the control, the organic matters in the soil increased by 15.8% on average when the straws were turned over at a rate of approximately 22 500kg·hm-2 per year.And, the bulk density of the soil declined by 8.7%.Both of the above reached significant difference.Furthermore, the total N, P, K, effective P and available K in the soil increased by 18.4%, 16.7%, 9.5%, 19.7%and 70.5%, respectively.In comparison with the chemical fertilization, a significant 6.8%increase on the rice output from the straw-turnover was realized from the gains in panicle and grains per panicle.Consequently, the practice could be promoted in the province to benefit the fertility of the soil as well as the productivity of the rice.
- Chinese milk vetch (Astragalus sinicus L.) /
- straw turnover /
- soil fertility /
- rice productivity

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