安宁河流域稻米生化品质的气候关系模型

利用粳稻品种“合系39”在安宁河流域无控制的地理分期播种试验稻米,在实验室进行稻米生化品质的化验分析;采用统计分析方法,研究了气候生态因子与稻米生化品质的定量关系,找出影响稻米生化品质各组分的关键时期,建立综合关系模型.研究结果表明: 1)气候生态条件对生化品质不同组分影响的关键因子和关键时期不同,一些组分的关键期在齐穗前,一些在齐穗后,一些则从齐穗前持续到齐穗后; 2)温度是影响稻米生化品质含量的主要气候因素,蛋白质、氨基酸和直链淀粉含量与关键期的温度呈直线负相关,支链淀粉含量与关键期的温度呈抛物线关系; 3)温度日较差、日照时数与蛋白质、氨基酸、直链淀粉呈负相关,与支链淀粉呈正相关. 图4表2参10

CLIMATIC RELATIONSHIP MODEL OF RICE BIOCHEMICAL QUALITY IN THE ANNING RIVER VALLEY

The meteorological conditions for biochemical qualities of rice were analyzed. This analysis employed a variety of observations from cropland experiments of which planting was conducted geographically and periodically without control in the Anning River Valley, and from the analyzing data of the laboratory assay on the biochemical qualities of rice. An integrated relationship model for the relationship of the biochemical qualities of rice with mean temperature, daily ranges of temperature and the insulation duration hours of the pivotal moments was developed. The analysis indicated: 1)the climate ecological conditions had different impact models and pivotal moments on different components. The prominent correlative time of some components was beyond the full heading period, while that of some other components was from before the full heading period to after the full heading period; 2) the primary factor impacting the biochemical qualities of rice was temperature, and the relationship among protein, amino acids, AC and temperature was negative, but amylopectin was parabola; 3)the negative relationship among protein, amino acids, AC, daily ranges of temperature and the insolation duration hours of the pivotal moments was also found. Fig 4, Tab 2, Ref 10