摘要
为探讨不同栽培模式对双季稻氮素吸收利用的影响,以中早25和桃优香占为材料,设置机插秧(JC)、机抛秧(JP)、人工手抛(RP)3 种栽培模式,采用大区试验,比较不同栽培模式下双季稻产量及氮素吸收利用的差异.结果表明:早稻季JC处理的理论产量分别比JP处理、RP处理高 51.91%、32.70%;实际产量分别比JP处理、RP处理高 51.62%、48.78%.晚稻季JP处理的理论产量分别比JC处理、RP处理高 9.45%、8.26%;实际产量分别比JC、RP处理高 11.66%、7.07%.早稻成熟期JC处理的总干物质积累量分别比JP处理、RP处理高 51.60%、131.69%;晚稻成熟期RP处理的总干物质积累量分别比JC、JP处理高 17.18%、3.73%.早稻植株总氮积累量以JC处理最高,分别比JP、RP处理高 45.22%、33.01%;晚稻植株总氮积累量以JP处理最高,分别比JC、RP处理高 25.09%、5.77%.因此,在湘北地区早稻机插与晚稻机抛有利于提高氮素利用率和水稻产量.
Abstract
To explore the effects of different cultivation modes on nitrogen(N)uptake and utilization in double cropping rice,the differences in the yield and the N uptake and utilization of double cropping rice under different cultivation modes were compared by using wide field trial,setting three cultivation modes of machine transplanting(JC),machine throwing(JP)and hand throwing(RP),with Zhongzao 25 and Taoyouxiangzhan as the materials.Results showed that early season rice by JC had the theoretical yield 51.91% and 32.70% higher than that by JP and RP,respectively,and the actual yield 51.62%and 48.78%higher;late season rice by JP showed the theoretical yield 9.45%and 8.26%higher than that by JC and RP while the actual yield 11.66%and 7.07%higher.During the mature period,the total dry matter accumulation amount of early season rice by JC was 51.60%and 131.69%higher than that by JP and RP,while that of late season rice by RP was 17.18%and 3.73%higher than that by JC and JP,respectively.For early season rice,those by JC showed the highest total N accumulation,which was 45.22%and 33.01%higher than that by JP and RP,respectively;while for late season rice,those by JP exhibited the highest value,which was 25.09%and 5.77%higher than that by JC and RP,respectively.Therefore,in northern Hunan,machine transplanting(JC)for early season rice and machine throwing(JP)for late season rice are conducive to the improvement of N utilization rate and rice yield.
国家科技期刊平台
NSTL
维普
万方数据