不同覆膜方式对甘薯生长发育的影响

通过比较3种不同覆膜方式即黑膜、透明膜及不覆膜对甘薯生长发育过程中土壤温湿度、孔隙度、甘薯地上部及地下部生长发育动态的影响,确定最佳的覆膜方式。结果表明,土壤孔隙度在覆膜与不覆膜之间存在明显差异,覆膜可以使土壤保持疏松透气,同时还可以起到增温保墒的作用,为甘薯膨大提供一个好的环境;相对于透明膜而言,覆黑膜可以将地温控制在更能适宜甘薯膨大的范围之内,抑制膜下的杂草生长。不同栽培方式对甘薯产量的影响依次为黑膜>透明膜>无膜。可见,在甘薯生长发育过程中,覆膜可以提高产量,并且覆黑膜比覆透明膜的效果更好,应当在甘薯栽培中推广黑膜覆盖技术。

Effect of Different Film Mulching Methods on Growth and Development of Sweet Potato

In order to select the best mulching method,three different coating methods,black film,transparent polyethylene film and non-film were used to explore the effects on soil temperature and humidity,porosity,and growth dynamics of shoot and root in the process of sweet potato’s growth and development.The results showed that soil porosity was different between the coated and non-coated treatment;coating can keep the soil loose,and play a role in soil moisture retention and warming,and provide a good environment for the sweet potatoes.Compared to white film,the ground temperature under the coverage of black film can be controlled within the range more suitable for enlargement of sweet potato,and the growth of weed can be inhibited under the film.The yield of sweet potato covered by black film is the highest,then white film,and no film.This suggested that in the process of growth and development of sweet potato coating can improve the yield,and black film mulching technology is better than white film mulching technology.Collectively,the black film mulching technology should be promoted in sweet potato cultivation.