氮肥运筹和穴栽苗数对水稻根系生长的影响  

Effect of Nitrogen Fertilizer Application and Seedlings Per Hole on Root Growth of Rice

作　　者：庄文锋[1,2] 杨文月[3] 邵玉丽 杨猛[2,5] 徐正进[1] 

机构地区：[1]沈阳农业大学水稻研究所,沈阳110161 [2]哈尔滨市农业科学院,哈尔滨150070 [3]哈尔滨市农业委员会,哈尔滨150021 [4]山东省滨州市滨城区农业局,山东滨州256617 [5]中国科学院东北地理与农业生态研究所,哈尔滨150081

出　　处：《湖北农业科学》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)

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.

关 键 词：水稻 氮肥运筹 穴栽苗数 根系生长 

分 类 号：S[农业科学]