对可生物降解液体地膜的探究

Preliminary Exploration of Biodegradable Liquid Membrane

通过考察不同的土壤温度和湿度,考察了自制淀粉/PVA长效液体地膜、自制淀粉/腐植酸钠短效液体地膜覆盖对小白菜发芽的影响。结果表明,前者的成膜效果和后期的保湿效果较好,但对小白菜的发芽有抑制作用,其缺陷在于抑制发芽期间气体交换及幼苗顶出;后者对小白菜发芽有较好的促进作用,但由于腐植酸钠具有一定的盐度,保湿效果不如聚乙烯醇。

Through investigeting the difference temperature and humidity of soil,the effect of homemade starch/PVA long-acting liquid film and home made starch/sodium humate short-acting liquid film to chinese cabbage planting are compared.The result shows,the membrane effect and later period moisturiz-ing effect of the formers are good,but,it has inhibitory action to chinese cabbage germinating,its fault is restraining gas exchange and seedling ejection during germinate period;the latter has better auxo-action to chinese cabbage, but due to sodium humate has some salinity, its moisturizing effect is not equal to PVA.