摘要
本文通过盆栽及大田试验,对冬小麦开花灌浆期不同土壤湿度的小麦叶片光合速率测定得出:(1)土壤湿度在田间持水量的70%-85%时小麦光合速率最高,光合对土壤湿度的反应低湿较高湿更敏感;(2)土壤干旱可使小麦光合午休加重,适当灌溉可减小光合速率中午降低的程度;(3)土壤干旱后灌水,可明显提高小麦光合速率,以适宜土壤湿度下限时灌水效果最好.
This paper describes the response of the photosynthetic rate of winter wheat on soil moisture according to the experiment in pot and field during the flowering and filling stage. The results are as follows. 1. Optimal soil moisture for leaf's photosynthetic rate is 70%-80% of field capacity, and the photosynthetic rate is more sensitive to low soil moisture than to high soil moisture. 2. Soil drought strengthens the Photosynthetic Midday Rest, and irrigation can relieve it. 3. The photosynthetic rate increases significantly when watered after soil drought, and watering at the low limit of optimal soil moisture is most effective for the photosynthetic rate.
出处
《中国农业气象》
CSCD
北大核心
1992年第4期8-11,共4页
Chinese Journal of Agrometeorology
关键词
冬小麦
土壤
湿度
光合速率
小麦
Winter wheat Photosynthetic rate Soil moisture
