温室膜下滴灌甜瓜茎流变化规律研究

The study for the melon stem flow regulation under drip irrigation in the greenhouse

以"一品天下208"甜瓜为试验品种,在日光温室内进行了灌溉试验研究,采用φ20蒸发皿的日水面蒸发量为灌溉水量控制指标,设置了不同蒸发量系数(Kp=0.45;0.6;0.75;0.9)的供水处理,研究表明:(1)在具有典型代表天气条件下晴天时,T2、T3、T4处理茎液流在15:00—17:00期间均达到峰值,趋势为T4>T3>T2,在20:00基本降至极低值,阴天液流的变化没有明显的最大值状态界限,但变化波动较大。(2)各处理条件下的茎流通量密度在不同的生育阶段有所不同,在果实膨大期阶段局均大于果实成熟期。(3)通过对温室甜瓜土壤含水量的资料分析,发现温室小型甜瓜日茎流量的变化与0—30cm的土壤水分的变化具有良好的相关性,相关系数为0.4356。

This paper introduces the irrigation test research for the called No.one sweet melon ＂208＂ in the solar greenhouse,which was using φ20 pan daily evaporation for irrigation water control targets,set a different evaporation coefficient（Kp = 0.45;0.6;0.75;0.9） water supply treatment,the research shows that：（1） in the typical weather conditions with sunny days,T2,T3,T4 treatment the flow in the stem reached the peak at 15：00-17：00,trends T4 T3 T2,the basic down to very low values at 20：00;the cloudy fluid changes in the maximum state of no clear boundaries,but the change volatile.（2） the processing of stem flux density is different under the different growth stages,fruit enlargement period was more than fruit maturity.（3） through data analysis of soil moisture content in greenhouse,the changing of stem flow of small melon has a good correlation with the soil moisture of 0-30cm,which correlation coefficient was 0.4356.