摘要
在豫南稻区,通过田间试验研究了翻压不同量紫云英配施减量化肥对土壤肥力和水稻产量的影响。本研究在化肥减量20%和40%条件下,将紫云英翻压量设22.5、30、37.5、45 t/hm^24个水平,另设仅施用100%化肥处理作为对照。结果表明,与对照相比,减施20%和40%化肥配施紫云英可使土壤碱解氮分别增加14.4%~20.9%和13.5%~26.5%,有机质分别增加4.5%~10.8%和4.2%~8.2%,差异均达到显著水平。水稻产量随着紫云英翻压量的增加出现先升后降趋势,在减量20%化肥条件下,翻压30 t/hm^2紫云英时水稻产量最高,比对照增产16.7%,差异极显著;而在减量40%化肥条件下,翻压37.5 t/hm^2紫云英时水稻产量最高,比对照增产15.3%,差异极显著;与对照比较,翻压紫云英极显著提高了水稻有效穗,但每穗实粒数较对照有所降低。
A field experiment was carried out to explore the appropriate usage of Chinese milk vetch combined with reduced 20% and 40% chemical fertilizer on soil fertility and rice yield in South Henan Province. The series of Chinese milk vetch application was 22. 5, 30, 37. 5,45 t/hm2 ,and 1 0 0 % chemical fertilizer as the control. The results showed that the con-tents of alkali-hydrolyzable nitrogen ＂were increased by 14. 4% -20. 9% and 13. 5 % -26. 5 %,and the soil organic matter were increased by 4. 5% -10. 8% and 4. 2% -8. 2% under reduced 2 0 % and 4 0 % chemical fertilizer combined with Chinese milk vetch conditions compared with the control. The rice yield were increased firstly, and then decreased with the increasing amounts of Chinese milk vetch. The treatment with 30 t/hm2 of Chinese milk vetch had the highest rice yield which increased by 16. 7% （ P 〈 0. 01） in comparison with the control under chemical fertilizer reduced 2 0 % condition. The treatment with 37. 5 t/hm2 of Chinese milk vetch had the highest rice yield which increased by 15. 3 % （P 〈 0. 01） under chemical fertilizer reduced 40% condition. The efficient panicles of rice were increased significantly by incorporating Chinese milk vetch, but the filled-grain number was decreased compared with the control.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2017年第5期94-98,共5页
Soil and Fertilizer Sciences in China
基金
国家绿肥产业技术体系(CARS-22)
河南省科技攻关计划项目(172102110125)
关键词
紫云英
土壤肥力
水稻产量
Chinese milk vetch
soil fertility
rice yield
