滨海盐碱稻区钾肥施入量对水稻产量及钾肥利用率的影响
Effects of Potash Fertilizer Amount on Rice Yield and Potash Use Efficiency in Coastal Salinealkaline Rice Growing Areas
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摘要: 以“盐丰47”为材料,采用小区对比试验方法,探讨了钾肥不同施量对水稻生育性状、产量及钾肥利用率的影响。结果表明,适量施入钾肥可促进水稻单位面积收获穗数及颖花量、群体叶面积指数及高效叶面积率、干物质产量及齐穗后干物质积累量占子粒产量百分比的增加,提高钾肥利用率及钾肥生产力,进而提高了水稻产量。滨海盐碱稻区适宜施钾量(K2O)为67.5~90.0 kg/hm2。Abstract: Taking ‘Yanfeng 47’ as a case,effects of different potash fertilizer amounts on character,yield and potash use efficiency of rice were discussed with plot experimentsResults showed that appropriate amount of potash fertilizer could increase rice panicles and spikelets in per unit area,colony leaf area index and effective rate of leaf area,dry matter yield,and ratio of dry matter accumulation and grain yield after the full heading stage.Potash use efficiency and productivity were improved with appropriate amount of potash fertilizer,and then rice yield was increased.Suitable amount of potassium(K2O)was 67.5~90.0kg/hm2 in coastal salinealkaline rice growing areas.
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Keywords:
- Rice /
- Potash fertilizer /
- Leaf area index /
- Dry matter yield /
- Potash use efficiency /
- Potash productivity
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