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用三个水稻籼粳杂种一代为材料,以其亲本和汕优63为对照,研究了籼粳杂种氮素营养特性.结果表明:三个籼粳杂种全生育期总吸氮量比中亲值高1.70—32.77%,每生产 500千克稻谷需氮量比中亲值低13.60—28.07%;在分蘖盛期至齐穗期出现一个吸氮高峰,吸氮速率在2.76—3.6千克/公顷·天,比高亲值和汕优63高;生育前期的吸氮速率高于高亲值和汕优63,而齐穗至成熟期则低于汕优63;吸氮比例秧苗期为1.94—3.75%,比中亲值高0.38—2.00%,齐穗至成熟期为23.66—27.15%,比中亲值高1.53—5.23%;穗内含氮达64.29—67.97%,高于粳型亲本而低于籼型亲本,但比汕优63高0.54—4.22%.
Three rice indica-japonica hybrids were used as materials, and their parents and Shanyou 63 were used as control to study the nitrogen nutrition characteristics of indica-japonica hybrids. The results showed that the total N uptake of three indica-japonica hybrids High 1.70-32.77%. The yield of nitrogen required per 500 kg of rice was 13.60-28.07% lower than that of the middle progenies. A peak of nitrogen uptake occurred at the tillering stage from full tillering to full heading, and the nitrogen uptake was 2.76-3.6 kg / ha · day , Higher than the high-parent and Shanyou 63. The N uptake rate in early growth stage was higher than that in high-value and Shanyou 63, while it was lower than that in Shanyou 63 in heading stage to maturity stage. The proportion of nitrogen-absorbing seedling stage was 1.94-3.75% , 0.38-2.00% higher than the pro-mid parent value, 23.66-27.15% from heading to maturity, 1.53-5.23% higher than the mid parent, and 64.29-67.97% nitrogen content in ear, which was higher than that of japonica type parents Indica parent, but higher than Shanyou 63 0.54-4.22%.