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采用对比试验,研究不同施氮量(90,120,150和180 kg/hm~2)对机插双季早稻陵两优102群体结构和产量的影响。结果表明,随施氮量增加,陵两优102分蘖盛期提前,最高苗数增加,全生育期延长,成穗率下降,施氮量不足或过高都不利于高产。在本试验条件下,以施纯氮150 kg/hm~2处理群体结构较优,穗粒结构较佳,单产最高。
A comparative experiment was conducted to study the effects of different nitrogen application rates (90, 120, 150 and 180 kg / hm ~ 2) on the structure and yield of Liangyou 102 population in early seasons. The results showed that with the increase of nitrogen application rate, the tillering stage of Lingliangyou 102 advanced, the maximum seedling number increased, the whole growth period was prolonged, the ear percentage decreased, and the nitrogen deficiency or excess was unfavorable to high yield. Under the experimental conditions, the population structure of 150 kg / hm ~ 2 nitrogen application was superior, the grain structure was better and the yield was the highest.