氮肥对西辽河平原灌区不同穗型水稻氮素吸收与分配的影响  

Influence of N Fertilizer on N Accumulation and Distribution of Different Panicle Rice in Irrigated Region of Xiliaohe Plain

作　　者：宋桂云[1] 王云[1] 徐寿军[1] 侯迷红[1] 

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028042

出　　处：《核农学报》2014年第9期1715-1721,共7页Journal of Nuclear Agricultural Sciences

基　　金：内蒙古自然科学基金(2012MSO302);市校合作(SXYB2012070);教育部第43批留学回国人员科研启动基金

摘　　要：通过比较氮肥对不同穗型水稻产量、氮素积累和分配方面的差异,探求西辽河平原灌沤不同穗型水稻氮肥需要量。本研究选用典型的直立穗型水稻品种沈农265和半直立穗型水稻品种辽粳294为试材,研究氮肥对水稻氮素吸收和分配等的影响。结果表明,不同氮肥条件下,直立穗型沈农265穗长、穗粒数及经济系数较高,穗数较低;抽穗至收获阶段,直立穗型沈农265氮素积累量高于半直立穗型辽粳294,分蘖至抽穗阶段相反。增施氮肥可以提高水稻氮素最大累积速率,使氮素最大累积速率及快速累积速率出现时间提前。和半直立穗型辽粳294相比,直立穗型沈农265氮素最大累积速率小,最大累积速率出现时间及快速累积速率起止时间延后,高氮处理下氮素的吸收速率和利用效率相对较高。The aim was to know N fertilizer needed by different panicle rice in xiliaohe region through comparing the difference of N fertilizer on yield, N accumulation and distribution of different panicle rice. The typical erect-panicle rice-‘Shennong 265＇ and half-erect-panicle rice-‘ Liaojing 294＇ were used to study the influence of N fertilizer on N accumulation and distribution through field experiment. The results showed that The spike length, spikelet number, and harvest index of erect-panicle rice-‘ Shennong 265 ＇ were higher than that of half-erect-panicle rice-‘Liaojing 294＇ , but the spike number was reversed under different N rates; N accumulation amount of erect-panicle rice-‘ Shennong 265 ＇ was more than that of half-erect-panicle rice-‘ Liaojing 294＇ form heading stage to harvest, and the result was reversed from tiller stage to heading stage under different N levels. The rate of N maximum accumulation was improved, and the beginning and ending time of the biggest and rapid N accumulation rate were in advance due to N application. Comparing with half-erect-panicle rice-‘ Liaojing 294 ＇ , The N maximum accumulation rate of erect-panlcle rice-‘Shennong 265 ＇ was lower, and the time when the N maximum accumulation and rapid accumulation rate appeared was postponed, N absorption and use efficiency were better especially under high N level.

关 键 词：产量结构 氮肥效率 最大累积速率 穗型 

分 类 号：S511[农业科学—作物学]