摘要
依据2006、2007年两年小区试验,对根系分区交替灌溉条件下温室甜椒生长、产量及水分利用效率对不同灌水下限的响应进行了研究。结果表明:占田间持水量60%的灌水下限(T3)处理甜椒叶片光合速率最大,有效地阻止无效蒸腾失水,水分利用效率最高,占田间持水量70%的灌水下限(T4)处理产量达到最高。对甜椒产量、水分利用效率与灌水下限之间的关系进行回归分析,得出30cm内当灌水下限为田间持水量的70%左右时,甜椒鲜质量小区产量可达最大值;当灌水下限为田间持水量的65%时,甜椒水分利用效率有最大值。综合考虑节水、增产和提高水分利用效率等多种因素,根系分区交替灌溉条件下温室甜椒灌水下限应控制在65%田间持水量左右为宜。
According to the plot experiments in 2006 and 2007, the growth, yield and water use efficiency （WUE） of sweet pepper with different irrigation low limits under alternate partial root-zone irrigation in greenhouse were investigated. The results show that photosynthesis rate of sweet pepper leaves and WUE are highest, no effective transpiration is reduced significantly when irrigation low limit was 60% of field capacity （T3）; the highest yield is gained when irrigation low limit was 70% of field capacity （T4）. Regression analysis was used to analyze relationships between sweet pepper yield, WUE and irrigation low limit. The maximum fresh yield in plot was gained when irrigation low limit （30 cm soil） was about 70% of field capacity. Moreover, WUE achieved maximum when irrigation low limit was about 65% of field capacity. Results from this study show that the appropriate irrigation low limit for sweet pepper under alternate partial root-zone irrigation in greenhouse is 65% of field water capacity.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2008年第6期78-84,共7页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金重点项目(50339030)
关键词
根系分区交替灌溉
甜椒
灌水下限
产量
水分利用效率
alternate partial root-zone irrigation
sweet pepper
irrigation low limit
yield
water use efficiency
