在国外,六十年代已开始应用塑料薄膜覆盖地面(简称地膜),以促进农作物生长发育和提高产量。我国从七十年代开始进行地膜试验,证明对蔬菜、棉花、花生等都有增产作用。地膜在果树上的应用也有过不少报导。本文就冬季用不同颜色地膜覆盖柑桔园,对其土温、桔树冻害、生长状况及产量的影响情况,根据1982～1983年试验结果,进行了分析。 一、试验材料及方法 本试验在浙江海宁县黄湾公社进行。该地属北亚热带季风气候,冬季温度较低,土壤为粉砂壤土。供试品种为枳砧温州蜜柑,5年生,由于冻害影响和管理水平较低,桔树生长状况较差,树冠覆盖度仅30％左右。 Abroad, in the 1960s, plastic film covering the ground (referred to as plastic film) has been started to promote crop growth and increase production. From the seventies of the beginning of our plastic film test to prove that the vegetables, cotton, peanuts, etc. have a yield. Mulch has also been reported on the application of fruit trees. In this paper, the effects of citrus orchards on the soil temperature, the frost damage, the growth status and the yield of orange trees were covered by different colors of mulching film in winter. The results were analyzed from 1982 to 1983. First, the test materials and methods The test was conducted in Huangwan Commune, Haining County, Zhejiang Province. The north subtropical monsoon climate, the winter temperature is low, the soil is silty loam. The tested cultivars were Hovenia dulcis Thunb., 5-year-old. Due to the influence of frost damage and lower management level, the orange tree was in a poor condition and the crown coverage was only 30%.