摘要
研究了冬小麦不同生育期(拔节、孕穗、灌浆)、不同用量保水剂(处理1,0 kg/hm2;处理2,45.0 kg/hm2;处理3,52.5 kg/hm2;处理4,60.0 kg/hm2)下冬小麦的光合速率、蒸腾速率、水分利用效率以及作物水分生产效率。结果表明:整个生育期内,冬小麦的净光合速率(Pn)、蒸腾速率(Tr)及水分利用效率(WUE)均表现为:孕穗期>灌浆期>拔节期。各生育期内,随保水剂用量的增加,光合速率、蒸腾速率和水分利用效率均增大。收获后,冬小麦水分生产效率各处理均优于对照,45.0、52.5和60.0 kg/hm2的处理分别比对照高:5.4、5.5和10.4 kg/(mm.hm2)。
A study is made on the photosynthesis rate （ Pn ）, transpiration rate（Tr）, water use efficient （WUE） and water producing effieieney of crop in different growth stages of winter wheat（jointing, booting and filling stages） and different treatments with various amount of water-retaining agent, including 45.0,52.5,60.0 kg/hm^2 and 0 kg/hm^2 （ CK）. The result indicates that the Pn, Tr and WUE of winter wheat are ranged in order from higher ones to lower ones as follow ： booting, filling and jointing during the growth stages. In each growth stage, the Pn, Tr and WUE all augment with the increase of water-retaining agent. In other treatments such as 45.0, 52.5 and 60.0 kg/hm^2, the water produeing ef- ficiency of winter wheat all excels that in CK by 5.4, 5.5 and 10.4 kg/（mm·hm^2） respeetively after harvest.
出处
《干旱地区农业研究》
CSCD
北大核心
2009年第4期131-135,共5页
Agricultural Research in the Arid Areas
基金
"十五"和"十一五"国家863节水农业项目(2002AA2Z4291
2006AA100215)
河南省重大公益性科研项目(081100911600)
