气象条件对陇东塬区冬小麦灌浆速率的影响

为了解陇东塬区冬小麦灌浆与气候条件的关系,利用西峰农业气象试验站观测资料,分析了气象条件对冬小麦灌浆速率的影响。结果表明,冬小麦灌浆速率与日最高气温、日较差、日照时数、总辐射呈正相关,而与降水量、相对湿度呈负相关。通过通径分析,灌浆速率的主要决定因子是日较差和日照时数,其中日照时数影响最大,其直接通径系数达0.731 7,最高气温、日较差、总辐射主要通过日照时数对灌浆速率起间接作用。灌浆速率最大时期出现在冬小麦花后23d前后。

Influence of Meteorological Conditions on the Grain Filling Rate of Winter Wheat in the East of Gansu

The data collected in Xifeng agricultural meteorological station was used to analyze the influence of meteorological conditions on the grain filling of winter wheat. the results showed there was a positive correlation between grain filling rate with the daily maximum temperature, daily range, sunshine duration, total solar radiation, while a negative correlation was observed with precipitation, and relative humidity. Path analysis indicated that the main determining factor for grain filling was daily range and sunshine hours, and the sunshine duration was the major factor influencing the filling rate with the direct path coefficient of 0.731 7, the other elements (the highest temperature, diurnal temperature range, the total radiation) were with indirect effect, mainly through the sunshine hours to play a role in grain filling rate. The maximum grain filling rate in winter wheat occurred at 23 d after anthesis.