【摘要】 选用籼稻"云恢290"在云南的蒙自、开远和石屏进行地理分期播种试验,定量地研究了云南气候条件对稻米淀粉含量影响的关键因子和关键时期,建立了淀粉含量的气候生态综合模型。结果表明,直链淀粉与温度具有显著的负相关关系,与日照时数呈抛物线关系,影响的关键时期在齐穗前15d~齐穗后5d;支链淀粉与温度呈抛物线关系,关键时期在齐穗前10d~齐穗后15d,与日照时数呈正相关关系,关键时期在齐穗前15d~齐穗后5d,日照多有利于支链淀粉的增加。更多还原

【Abstract】 Based on the data of date tests on paddy rice Yunhui 290 in the Yunnan plateau,the effect of meteorological conditions to the starch content of rice was studied to identify the key factors and growing period.A comprehensive climatic-ecological model on the starch content of rice was developed.The results showed that the amylase content was positively related to the temperature,but related to the sunshine hour in a parabola form.The key period was between 15 days before heading and 5 days after heading.The amylopectin content was related to the temperature in a parabola form and the key period was between 10 days before heading and 15 days after heading,while it was positively to the sunshine hour and the key period was between 15 days before heading to 5 days after heading.With increasing of the sunshine hour,the amylopectin content increased.更多还原