摘要
土壤水分传感器测定土壤含水率从而指导灌溉,对于提高作物水分利用效率和产量都具有十分重要的意义。对番茄种植中产量与水分利用效率最佳的水分条件以及土壤水分传感器的最佳埋设位置进行了试验研究。结果表明,在开花坐果期土壤含水率下限控制在60%的田间持水率,结果盛期土壤含水率下限控制在75%的田间持水率是番茄生长的最优水分条件;同时,10—20cm土层土壤含水率能很好地代表计划湿润层内的平均土壤含水率(开花坐果期和盛果期R2分别达到0.95和0.85以上),把土壤水分传感器埋设于此土层深度比较合理。
Soil moisture sensors are used to measure soil moisture content so as to guide irrigation, which has great significance for improving water use efficiency and crop yield. This study presents the best water condi- tion for enhancing both the yield and the water use efficiency in tomato-planting field, and determines the op timal soil depth for burying soil moisture sensors. The results show that it is the optimal water condition for tomato growth when the lower limit of soil moisture content is 60% of field capacity at flowering and fruit bearing stage and 75% of field capacity at fruit stage; and meanwhile, the soil moisture content at 10--20 cm layer may better represent the mean soil moisture content of the designed irrigation layer （R2 〈0.95 and 0.85 for flowering and fruit bearing stage and fruit stage, respectively）, so it is more reasonable to bury soil moisture sensors in the depth.
出处
《水土保持通报》
CSCD
北大核心
2013年第4期260-263,共4页
Bulletin of Soil and Water Conservation
基金
北京市教委科学研究与研究生培养共建项目“北京山区生态风险监测与评估技术研究”
国家自然科学基金项目(51239009)
关键词
灌水下限
土壤含水率
土壤水分传感器
番茄种植地
lower level of irrigation limit
soil moisture content
soil moisture sensor
tomato-planting field
