微润灌压力水头对土壤水分及青椒生长的影响研究

Effect of Pressure Head on Soil Moisture and Growth of Green Pepper by Moistube-irrigation

压力水头是微润灌溉的重要控制指标,为研究其对土壤水分及温室青椒生长的影响特性,设计种植了由3种压力水头与2种管带埋深交叉组成的6组试验作物,并对不同压力水头下青椒根区土壤水分变化以及其株高、产量、灌溉水分利用效率进行了试验研究。结果表明:压力水头为150 cm时,最适宜青椒生长发育;不同压力水头下,青椒株高增长随定植时间的变化曲线可以用Logistic函数进行拟合,拟合效果良好;压力水头为100 cm,青椒灌溉水利用率最高。

Pressure head was a crucial factor of moistube-irrigation. In order to study the effects of moistube-irrigation on the growth of green pepper and soil water condition, six field experimental treatments with three different pressure heads and two different buried depths were designed, and green peppers plant height, yield , irrigation water use efficiency and the change of root zone soil moisture were studied under different pressure head. The results showed that the pressure head of 150 cm was the most suitable for the growth and development of green pepper; under different pressure head, the plant growth curve of green pepper along with the change of engraftment time can be fitted by using Logistic function and the fitting effect is good; when the pressure head is at 100 cm, the green pepper irrigation water utilization is the highest.