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

发布时间：2018-10-14 20:05

【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。
[Abstract]:In the south Henan rice region, the effects of different amount of Ziyunxiao and reduced chemical fertilizer on soil fertility and rice yield were studied through field experiments. Under the condition of fertilizer reduction of 20% and 40%, the pressure turning rate of Ziyun was set at the level of 22.5g ~ 37.5 t / hm ~ 24, and only 100% chemical fertilizer was applied as the control. The results showed that 20% and 40% chemical fertilizer combined with Zyunyunyue could increase soil alkali-hydrolyzed nitrogen by 14.4% and 13.5%, respectively, and increase organic matter by 4.510.8% and 4.22%, respectively. The difference reached a significant level. The yield of rice increased first and then decreased with the increase of the pressure of Ziyunying. Under the condition of reducing 20% chemical fertilizer, the yield of rice increased 16.7% higher than that of the control under the condition of reducing 20% chemical fertilizer for 30 t/hm~2, and the difference was very significant, but under the condition of 40% less fertilizer, the yield of rice increased significantly. The yield of rice was the highest when the pressure was 37.5 t/hm~2, and the yield was 15.3% higher than that of the control, the difference was significant, compared with the control, the effective panicle of rice was increased significantly, but the number of grains per panicle was lower than that of the control.
【作者单位】：信阳市农业科学院;河南省农业科学院植物营养与资源环境研究所;中国农业科学院农业资源与农业区划研究所/农业部植物营养与肥料重点实验室;
【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)
【分类号】：S158;S511

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