Nitrogen ( N) application patterns is an important management measures that affects rice growth, photosynthetic material production and grain yield. Therefore, in order to investigate the characteristics of dry matter accumulation and grain yield in rice ( Oryza sativa L.) with different N application patterns in the double-cropping rice system, the dry matter accumulation and distribution, grain yield of early rice and late rice were analyzed under application of N was 120kg/hm2 of early rice and application of N was 210 kg/hm2 of late rice ( N120+210), application of N was 150 kg/hm2 of early rice and application of N was 180 kg/hm2 of late rice ( N150+180), application of N was 180 kg/hm2 of early rice and application of N was 150 kg/hm2 of late rice ( N180+150), application of N was 210 kg/hm2 of early rice and application of N was 120 kg/hm2 of late rice ( N (210 + 120) ), without application of N of early and late rice as a control (CK). The results showed that the tillering numbers of rice with N150+180 treatment were higher than that of the other treatments at the main growth stages of early rice and late rice. And the leaf area index with different treatments was N180+150> N150+180> N (210 + 120)> N120+210> CK and N150+180> N120+210> N180+150> N (210 + 120)> CK at the main growth stages of early rice and late rice, respectively. Meanwhile, the root dry weight of rice plant with N (210 + 120) and N120+210 treatments were higher than that of the CK treatment at the main growth stages of early rice and late rice, and the stem and leaves dry weight of rice plant with N (210 + 120) and N150+180 treatments were higher than that of the CK treatment at the main growth stages of early rice and late rice, the panicle dry weight of rice plant with N150+180 and N180+150 treatments were higher than that of the CK treatment at the main growth stages of early rice and late rice, respectively. The results indicated that there were no significantly differences in spikelet number per panicle and 1000 grain weight of rice plant among different treatments. The grain yield of early rice and late rice with N180+150 and N150+180 treatments were higher than that of the other treatments, respectively. Compared with CK treatment, the grain yield of early rice and late rice with N150+180 treatments increased by 1849. 5 kg/hm2 and 1879. 5 kg/hm2 respectively. Compared with other treatments, the different part of dry matter accumulation of rice plant with N150+180 treatment were reasonable distribution, and improved grain yield and yield components of rice plant.%氮肥运筹是影响水稻生长发育、物质生产及其产量的重要栽培措施.为探明双季稻区不同氮肥运筹模式对水稻植株干物质积累及产量的影响,设计5种施氮模式:早稻和晚稻均不施氮肥(N0,CK),早稻施N120 kg/hm2+晚稻施N210 kg/hm2(N120+210)、早稻施N150 kg/hm2+晚稻施N180 kg/hm2(N150+180)、早稻施N180 kg/hm2+晚稻施N150 kg/hm2(N180+150)、早稻施N210 kg/hm2+晚稻施N120 kg/hm2(N(210 + 120)),比较研究5种氮肥运筹模式下早稻和晚稻植株干物质积累及产量的变化.结果表明:(1)N150+180处理植株分蘖数下降幅度平缓,其分蘖数多、成穗率较高;(2)早稻各主要生育时期各处理植株LAI大小顺序为N180+150> N150+180> N(210 + 120)> N120+210> CK,晚稻各主要生育时期各处理植株LAI大小顺序为N150+180> N120+210> N180+150> N(210 + 120)> CK;(3)分蘖期至成熟期,早稻和晚稻植株的根系干重分别以N(210 + 120)、N120+210处理最高,茎、叶干重分别以N(210 + 120)和N150+180处理最高,穗干重均以N150+180和N180+150处理最高,且均显著高于CK;(4)各处理水稻的穗总粒数和千粒重均无显著性差异;(5)早稻和晚稻产量均以N150+180处理最高,分别比对照增加1849. 5和1879. 5 kg/hm2.因此,早稻施用纯氮150 kg/hm2和晚稻施用纯氮180 kg/hm2的施肥模式,有利于增加水稻植株干物质积累,改善产量构成因素,从而获得较高的水稻产量.
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机译:分离的核酸(多核苷酸),反义寡核苷酸,抑制或减少编码CO2SEN蛋白的消息和/或CO2SEN蛋白或植物多聚核苷酸和多肽多糖的植物植株的表达的方法植物保护细胞,植物细胞,植物片,植物组织或植物,植物的一部分的碳吸收量和碳排量的负,正调节及增加,碳保护层和水流以及CO 2 / CO 2交换水交换或损失水开放植物,关闭植物的气孔,部分植物,器官,植物片或植物细胞,以增强或优化植物,植物片,器官,植物,植物的一部分上的生物量积累,植物,种子或植物细胞中的植物细胞或种子,板温度的降低和蒸腾强度的提高,降低了T型保护细胞中的效率降低和碳含量