油葵不同灌溉模式对土壤水盐含量的影响及经济效益分析

The Analysis of Influence of Different Oil Sunflower Irrigation Modes on Soil Salt Content and Economic Benefit

通过研究油葵不同灌水方式对土壤水分、盐分含量的变化和经济效益比较,找出合理的灌溉模式,提高灌溉水利用率。试验设4个处理:不灌水(CK)、灌水1次(开花期)、灌水2次(开花期、灌浆期各一次)、灌水3次(现蕾期、开花期、灌浆期各一次),每次灌水量900 m3/hm^2,重复3次,随机区组排列。结果表明:灌水2次处理在降低0~20cm土层土壤盐分含量、p H方面效果最好;灌水2次处理显著提高了油葵产量和经济效益,分别比对照提高91%、117%。灌水2次处理模式有利于油葵正常生长发育,降低了土壤返盐,能抑制耕作层中盐分的表聚,显著地提高油葵产量和经济效益,是油葵最佳的灌溉模式。

In order to find reasonable irrigation model to improve irrigation water use efficiency,the influence of different oil sunflower irrigation modes on soil moisture,salt content is analyzed and the economic benefit is compared.The experiment includes four treatments：without irrigation（CK）,irrigation 1（flowering period）,irrigation 2 times（flowering,grain filling each time）,irrigation three times（budding,flowering and grain filling stage each time）,and the irrigation amount of each treatment is 900 m-3/hm2.Each treatment is repeated three times and randomly arranged.The results show that：the irrigation 2 times treatment has the best effect in reducing soil salt content of 0 - 20 cm soil layer and lowering the p H value,it significantly increases the yield of oil sunflower and economic benefits by 91% and 117% than the CK treatment.It can be concluded that irrigation 2 times treatment model is conducive to the normal growth and development of oil sunflower,can reduce soil salinization,inhibit the plow layer in salt accumulation,and can significantly increase yield and economic benefit of oil sunflower.So it is the best irrigation mode for oil sunflower.