关键词: 杂交中稻, 气象因子, 栽培方式, 品种, 蛋白质含量

Abstract:

In this paper, a field experiment were conducted under two cultivation patterns in 5 sowing dates, using mid-season hybrid rice varieties Ⅱyou 602 and Jingyou 127 as materials, to study the effects of meteorological factors at different growth stages on grain protein. The results indicated that, the sowing dates, cultivation patterns and varieties had significant effects on the protein content of rice, and the effect on grain protein content ranged from big to small order for sowing dates, varieties, cultivation patterns. There were increasing trend for the protein as the sowing date delayed, the protein increased significantly of the high-nitrogen and low-density treatment than those of low-nitrogen and high-density treatment. The protein content of Ⅱyou 602 were significantly higher than that of Jingyou 127, but the interaction effects of them were not significant at 0.05 level. It is good to the accumulation of grain protein in the condition of higher temperature and more precipitation before earing, and the key weather factors is different between different rice varieties, more precipitation in the whole growth period of rice is beneficial to the accumulation of protein for Jingyou 127, but Ⅱ you 602 would improve rice protein content in the condition of higher daily minimum temperature from jointing to full heading stage, less sunshine time from transplanting to jointing stage and from full heading to mature stage.

Key words: mid-season hybrid rice, meteorological factor, cultivation pattern, rice variety, protein content