小管出流灌溉技术在日光温室中的应用效果研究

温室内采用的供试作物为青椒,在土壤水分相同的条件下(土壤含水率下限为60%~70%,以占田间持水率的百分比计)通过试验对比分析了日光温室小管出流和沟灌2种灌溉方式对土壤温度、土壤水分、青椒叶绿素含量及长势、产量的影响。研究结果表明,在土层深度为5、15、25、35 cm时,小管出流的土壤温度较沟灌依次高0.24、0.23、0.17、0.30℃。在灌水前后的土壤水分空间分布及含水率均大于沟灌,小管出流灌溉方式下青椒的叶绿素含量较沟灌高6.8%,产量较沟灌增产34%,水分生产率比沟灌提高了0.9倍。

The Application Effect of Small Tube Flow in Greenhouse

We plant green pepper in greenhouse for research.Through comparing small tube flow with furrow irrigation,study the effect of soil temperature,soil humidity,chlorophyll content,growing development and yield at the same condition.We control the lower limit of the moisture content of soil at 60%~70%(account by the percentage of field capacity).The results show that the soil of temperature at depth of 5,15,25,35 cm in small tube flow is 0.24,0.23,0.17,0.30 ℃ higher than furrow irrigation respectively.And the chlorophyll content is 6.8% higher then furrow irrigation.The yield of green pepper and water use efficiency are high in small tube flow.The yield of pepper increase 34% in small tube floe and water use efficiency in small tube flow is ten times of furrow irrigation.