【摘要】 对Ⅱ优688整个生育期间的气候因子与产量及其构成要素进行相关分析,结果表明:有效穗与5月中旬的最高气温呈显著正相关,与8月中旬的日照时数呈显著负相关;结实率与9月上、中旬的最低气温呈显著正相关;穗总粒数与8月的最高气温呈显著正相关;实粒数与9月中旬的最低气温和平均气温分别呈显著和极显著正相关;产量与9月上旬的降雨量呈显著负相关,因此,可通过季节调整、植物生长物质应用等措施进一步提高Ⅱ优688的产量。更多还原

【Abstract】 The correlations between the climatic factors in the whole growth period of ⅡYou 688 and the yield and yield components of this rice variety were analyzed.The results showed that the productive panicles showed a significant positive correlation with the maximum air temperature of mid-May,and a significant negative correlation with the sunshine duration of mid-August.There was a significant positive correlation between the setting percentage and the minimum air temperature during the first 20 days of September.The number of total grains per panicle was significantly positively correlated with the maximum air temperature of August.The number of filled grains per panicle had significant and extremely significant positive correlations with the minimum air temperature and average air temperature of mid-September,respectively.The yield had significant negative correlation with the rainfall during the first ten days of September.Therefore,the yield of ⅡYou 688 could be further increased by some technique measures,such as the adjustment of the planting season,the application of plant growth regulator etc.更多还原