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采用盆栽模拟方法,研究残膜对玉米出苗及幼苗根系伸长的影响,结果表明,残膜的存在对玉米出苗率与根系伸长具有一定的抑制作用。土壤中普通地膜的残膜造成玉米出苗率低、出苗慢、根系穿透地膜的几率小,将会影响到玉米植株地上部的生长发育。降解地膜的残膜虽然对玉米出苗率及根系伸长也略有影响,但与普通地膜相比,对玉米出苗及根系伸长危害较小,且随着播种后时间的推移,这种危害逐渐消失。
Pot experiment was conducted to study the effect of residual film on seedling emergence and root elongation of maize. The results showed that the existence of residual film had certain inhibition effect on the emergence rate and root elongation of maize. Residues of ordinary mulch film in the soil cause low emergence rate of maize, slow emergence and low probability of root penetration through the mulch, which will affect the growth and development of corn shoots. Although the residual film degrading the mulch also had a slight effect on the emergence rate and root elongation of maize, it had less harmful effects on emergence and root elongation of maize compared with ordinary mulching film, and gradually decreased with the passage of time disappear.