川西高原气象条件对稻米品质的影响

Effects of Meteorological Conditions in Western Sichuan Plateau on Rice Qualities

为了研究气象条件对稻米品质(主要指蛋白质和氨基酸)的影响, 利用优质稻品种“合系 39号”, 在川西高原南部分期播种试验资料和稻米蛋白质、氨基酸等的实验室分析资料, 采用正交多项式积分回归方法, 分析了从齐穗前35天到成熟期间温度、日照、温度日较差等因子对稻米蛋白质及氨基酸含量的动态影响, 建立了气候生态主导因子的动态影响综合模型。结果表明, 温度的影响从齐穗前20天至齐穗后40天, 温度日较差和日照的影响从齐穗前30天至齐穗后40天, 且不同时期的影响系数不同, 但蛋白质、氨基酸的变化基本同步。

The proteinand necessary amino-acidcontent(NAC) of rice grains are important alimentationcomponents for people. To investigate the effect of meteorological conditions on the rice qualities based on the test data of meteorological conditions in multi-regional experiments with different sowing dates of rice and chemical analyses in laboratoryto rice grains, using the orthogonal polynomial integral regression, the changing effect of meteorological factors on the proteinand NACcontents of rice are studied in this paper. The result shows that the proteinand NACcontent are effected greatly by climatic factors and the key period for temperature is from 20 d before tasselto 40 d after tassel, but for the sunshine hours and daily range of temperature is from 30 d before tassel to 40 d after tassel.