冷型小麦灌浆期农田小气候特征分析

Analysis of the farmland microclimatic characteristics of cold type wheat during milk-filling

摘要: 根据农田小气候观测资料分析冷型小麦“陕229”和暖型小麦“9430”的农田小气候特征及成因结果表明，灌浆期冷型小麦“陕229”比“9430”光照度偏小0．3～6．8klx，0～0．2m 土壤温度偏低0．2～3．5℃(8：O0和20：O0地面温度除外)，株间气温偏低0．2～1．9℃ ，株间水汽压和相对湿度分别偏高20～170Pa和1％～9％，即冷型小麦的农田生态环境较冷湿，该特征是由“陕229”的生物学特性所形成，有利于抗御小麦灌浆期干热天气的危害。

Abstract: Based on the observed data from farmland microclimate．the farmland microclimatic characteristics and it’s forming causes are analyzed．The results show that the illuminance of cold type wheat“Shaan 229”in row is 0．3～6．8klx lower than that of warlTl type wheat“9430”during milk-filling．The soil temperature in 0～0．2m and air temperature in row of“Shaan 229”are 0．2～3．5℃ and 0．2～1．9℃ lower than those of“9430”respectively．the water-vapour pressure and the relative humidity of“Shaan 229”in row are 20～170Pa and 1％～9％ higher than those of“9430”respectively．In other words，the farmland ecological environment of the cold type wheat is cooler and wetter．Those characteristics are caused by biological characteristics of cold type wheat，which are favorable to tolerate the dry-hot weather during milk-filling of wheat．