【摘要】 为探明各种地膜覆盖对果园小气候的效应和对梨树的增产效果,笔者在杭州市种猪场试验场长明梨园进行了试验。结果表明:三种颜色的地膜覆盖均能显著改善梨园小气候,起到增温,平衡土壤水分,提高土壤热量水平的作用;同时,使得根量大大增加,吸收能力增强,比叶重提高,光合效能得到改善,增产效果明显。结果还表明:三种膜以绿膜、无色膜为好,黑膜次之。更多还原

【Abstract】 An experiment using 3 kinds of polyethylene mulching films was conducted on the HangZhou S. B. E Farm in 1981 to expore their effects on the growth and yield of sand pear ( Pyrus Pyrifolia Nakai ) CV. Huang-Mi. Results of the experiment showed that all mulchings markedy improved the microclimate of the orchard by increasing the soil temperature and the soil heat capacity and by reducing the fluctuation of soil moisture in different seasons. In the mean time, absorption ability, leaf quality and photosynthetic rate were raised and yield was increased significantly.Among the three kinds of polyethylene mulching materials used the green and transparent films showed better overall performanc than the black film.更多还原