华北农学报2016，Vol.31Issue(4)：192-198,7.DOI:10.7668/hbnxb.2016.04.030
灌水频率与灌水量对南瓜耗水特征与水生产力的影响
Effects of Irrigation Amount and Frequency on Water Consumption Characteristics and Water Productivity of Pumpkin
摘要
Abstract
In order to discuss the effect of water demand regulation and yield of pumpkin under different irriga-tion frequency and irrigation amounts,field experiments using the cultivar of pumkin Tianli as the experimental ma-terials,were conducted to elucidate the effects of irrigation amount and stage on the water requirements characteris-tics,yield,water use efficiency and fruit appearance of this crop,respectively,in 2014 and 2015.The experiment had five treatments:45 mm irrigation water was applied at seedling stage(represented as T1 ),45 mm at seedling stage and 30 mm at tendril extending stage (T2),45 mm at seedling stage and 45 mm at tendril extending stage (T3),45 mm at seedling stage,45 mm at tendril extending stage and 30 mm at flowering and fruit setting stage (T4),45 mm,45 mm and 45 mm at seedling stage,tendril extending stage and flowering and fruit setting stage,re-spectively (CK).The result showed that the fruit diameter size gradually increased with the increased of irrigation amount,the fruit diameter and longitudinal diameter of other treatments were significantly(P <0.05)increased than T1 ,however,different irrigation frequency had no significant effect on shape index of pumpkin.The water consump-tion increasing with the increased irrigation frequency and irrigation amount of pumpkin growth period,and different irrigation frequency and irrigation amount had a little effects on water consumption regularity.The water consump-tion of pumpkin appeared the same laws as follows:First,the flowering and fruit setting stage.Second,tendril exten-ding stage.Third,seedling stage,Forth,sowing stage,and the water consumption rate showed that:First,tendril ex-tending stage.Second,the flowering and fruit setting stage.Third,seedling stage.Forth,sowing stage.The largest wa-ter use efficiency were T2 (2014)and T4 (2015)and they were significantly higher than T1 and CK by 14.80%, 19.71 % (2014)and 25.59%,1 .89% (2015 ),respectively.The yield of T1 was significantly lower than other treatments,which were higher than T1 by 24.59%,29.75%,23.07%,21 .20%(2014)and 39.81 %,55.22%, 71 .85%,74.93% (2015),respectively.It was indicated that the critical period of pumpkin water demand was the tendril extending stage and flowering and fruit setting stage,irrigation in the two periods could significantly improve the yield of pumpkin.It would affect the yield and water use efficiency with too much or too less irrigation water. However,irrigation frequency and irrigation amount had little effect on the fruit shape index.Yield and water use ef-ficiency showed a parabola with the change of water consumption in Hexi oasis of irrigation pumpkin.关键词
南瓜/灌水量/灌水频率/耗水特征/产量Key words
Pumpkin/Irrigation amount/Irrigation frequency/Water consumption characteristics/Yield分类
农业科技引用本文复制引用
杨晓婷,张恒嘉,张明,巴玉春..灌水频率与灌水量对南瓜耗水特征与水生产力的影响[J].华北农学报,2016,31(4):192-198,7.基金项目
甘肃省高等学校基本科研业务费项目 （）
