摘要
在总施氮量相同条件下,研究了氮肥运筹和穴栽苗数对水稻根系生长和产量的影响。结果表明,氮肥后移和增加追肥次数提高了水稻产量,穴栽多苗增加了收获穗数从而提高产量。不同处理下,根系干重、根系长度、根系投影面积、根系体积均呈现先升高后降低的趋势,氮肥处理相差不大,穴栽苗数表现为D3>D2>D1。在抽穗期和乳熟期根体积和根系投影面积与产量呈极显著正相关,成熟期根系干重与根系投影面积呈极显著正相关。
Under the same condition of nitrogen amount,the effect of nitrogen fertilizer application and seedlings per hole on the root growth and the yield of rice were studied.The results showed that postponing N application and increasing the frequency of top dressing could improve the yield of rice.More seedlings per hole improved the yield of rice through increasing the harvesting spike number.In different treatments,the root dry weight,root length,projection area,and root volume were all showed the same tendency of increasing first and then decreasing.And there were little difference in them among the different nitrogen application treatments,while the seedlings per hole showed D3>D2>D1.The root volume and the projection area had significant positive correlations with the yield in heading stage and milky stage,the root dry weight and the projection area had significant positive correlations with the yield in maturity stage.
出处
《湖北农业科学》
北大核心
2013年第2期278-281,共4页
Hubei Agricultural Sciences
基金
国家科技支撑计划项目(2011BAD16B11)
关键词
水稻
氮肥运筹
穴栽苗数
根系生长
rice
nitrogen fertilizer application
seedlings per hole
root growth
