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早春塑料大棚中的地温常常不能满足喜温类蔬菜根系正常生长的要求,致使根系生长弱,吸收能力差,造成地上部叶片焦黄,茎秆纤细,生长缓慢。我们结合大棚防冻,针对早春棚中地温低的问题,初步研究了地膜、小拱棚、地膜加小拱膜、电热线加地膜小拱棚对地温的作用。地膜采用0.015×75厘米的无色膜。小拱棚宽100厘米、长340厘米、
Early spring plastic tents in the ground temperature often can not meet the normal growth of root vegetables like the requirements of root growth, resulting in weak growth, poor absorption, resulting in aerial shoots yellow, stems slender, slow growth. We combine the greenhouse antifreeze, in view of low ground temperature in early spring shedding problems, the preliminary study of the plastic film, small arch, plastic film plus a small arch film, electric wire plus plastic film small shed on the role of ground temperature. Film using 0.015 × 75 cm colorless film. Small arch shed 100 cm wide and 340 cm long,