地膜覆盖提高土壤温度对马铃著生长的影响,主要是在出苗和植株生长的初期,可使出苗期比露地栽培提前7～8天。这种影响主要是通过增加土壤5～10cm深处10℃以上的有效积温而实现的。同时,由于提前见光进行物质生产与积累,使匍匐茎顶端开始膨大的时间,茎叶与块茎干重平衡,块茎的日平均增长量达到高峰期都相应提前。在整个生长过程中,覆膜栽培每一测定期的生物产量均比露地要高,这种差别到后期逐渐缩小。 Film mulching to improve soil temperature on the growth of the bell, mainly in the early emergence and plant growth, seedling can make more than open field cultivation 7 to 8 days. This effect is mainly achieved by increasing the effective accumulated temperature above 10 ° C in the depths of 5 to 10 cm of the soil. At the same time, due to early see light for material production and accumulation, so that stolons began to expand the top of the stem, stem and leaf dry weight balance, tuber average daily growth reached a corresponding peak earlier. During the whole growing process, the biological yield of the film-mulching cultivation was higher than that of the open field in each measuring period, and the difference gradually decreased after the latter period.