头季稻氮肥运筹对再生稻干物质积累、产量及氮素利用率的影响  

Effect of nitrogen application strategy in the first cropping rice on dry matter accumulation,grain yield and nitrogen utilization efficiency of the first cropping rice and its ratoon rice crop

作　　者：陈鸿飞[1,2] 杨东[3] 梁义元[2] 张志兴[2] 梁康迳[2] 林文雄[1,2] 

机构地区：[1]福建农林大学生命科学学院,福州350002 [2]福建农林大学农业生态研究所,福州350002 [3]福建省农业科学院水稻研究所,福州350002

出　　处：《中国生态农业学报》2010年第1期50-56,共7页Chinese Journal of Eco-Agriculture

基　　金：国家自然科学基金项目(30600385);福建省自然科学基金项目(2009J01060)资助

摘　　要：为探讨头季稻不同肥料运筹方式对再生稻产量和氮素利用率的影响,以杂交稻组合"Ⅱ优航2号"为材料,在头季施氮量225.00kg·hm-2的基础上,研究了不同基蘖穗肥氮素配比[3种基蘖肥与穗肥配比分别为8:2(N1)、7:3(N2)、6:4(N3)]头季稻-再生季稻氮素累积量、干物质生产、产量及氮素利用率的特性。结果表明:与N1、N2相比,头季成熟期N3处理氮素累积量分别增加9.26%、3.54%,头季齐穗期～头季成熟期N3处理氮素转移量分别增加21.47%、6.76%,整个生育期N3处理干物质净积累总量分别增加5.10%、4.78%。N3处理头季产量最高,达12431kg·hm-2,极显著高于N1、N2处理;氮肥利用率达46.44%,比N1、N2处理提高14.81%、5.43%;氮肥农学利用率达20.66kg·kg-1,比N1、N2处理提高14.97%、12.34%。研究结果还表明,头季不同基蘖穗肥氮素配比对再生稻再生季的影响不显著。The effect of fertilizer application strategy on nitrogen and dry-matter accumulation,grain yield and nitrogen utilization efficiency （NUE） of the ratoon rice crop and its first cropping rice was determined through designing 3 nitrogen applied proportion between basal-tiller dressing and panicle dressing [8：2（N 1）,7：3（N 2）,6：4（N 3）] in the first cropping rice season with a constant nitrogen supply at 225.00 kg·hm-2 in the experiment.The results indicate that N accumulation under N 3 treatment is 9.26% and 3.54% higher at ripening stage of the first cropping rice than that under N 1 and N 2 treatments.Transportation of N from vegetative parts to panicle during grain-filling stage of the first cropping rice under N 3 is separately 21.47% and 6.76% higher than under N 1 and N 2 treatments.For the entire growth period,net dry-matter accumulation in rice under N 3 treatment increases by 5.10% and 4.78% compared with N 1 and N 2.For grain yield of the first cropping rice,N 3 treatment produces the highest （12 431 kg·hm-2）,which is significantly higher than that produced by N 1 and N 2.N utilization efficiency of N 3 treatment is as high 46.44%,14.81% and 5.43% higher than that under N 1 and N 2.N agronomic efficiency in N 3 treatment is 20.66 kg·kg-1,14.97% and 12.34% higher than in N 1 and N 2.Furthermore,the results show that different nitrogen proportion between basal-tiller dressing and panicle dressing with a constant nitrogen supply （225.00 kg·hm-2 N fertilizer） in the first cropping rice has no significant influence on the ratoon rice crop.

关 键 词：头季稻 再生稻 氮肥运筹 氮素累积量 干物质积累 氮素利用率 产量 

分 类 号：S511.01[农业科学—作物学]