灌溉与覆盖对饲用玉米生长及品质的影响

Effect to Growth and Quality of Forage Maize under Irrigation and Straw Mulching Conditions

2010年进行了垄膜沟灌与沟秸覆盖对饲用玉米土壤水分及生长的影响研究。结果表明,在覆盖条件下,3 600 m3/hm2的灌水量与充分灌溉(灌水量4 500 m3/hm2)相比,土壤含水量仅降低0.28%～1.07%,但饲用玉米籽粒产量增加0.82%～20.80%,秸秆产量也仅降低1.8%,饲用玉米籽粒和秸秆品质得到了改善;在覆盖条件下,3 600 m3/hm2是西北半干旱地区饲用玉米增产适宜的灌溉量,研究结果丰富了作物灌溉理论;随着土壤深度的增加,根系生物量逐渐减少;但随着灌溉量的减少,较深层根系生物量有增加的趋势。

The experiment was completed in 2010 to study the effect of furrow irrigation with ridging film and ditch straw mulching on soil moisture and growth of forage maize.The results showed that： with 3 600 m^3/hm^2 irrigation plus mulching,the soil water content was only decreased by 0.28%～1.07%,but the grain yield of forage maize increased by 0.82%～20.80%,the yield of straw only decreased by 1.8% compared with full irrigation（4 500 m^3/hm^2）.At the mean time,the quality of grain and straw improved;with 3 600 m^3/hm^2 irrigation plus mulching is the suitable irrigation amount for forage maize in northwest semiarid region,and research results was contributed well on abundant the crop irrigation theory;With the increase of soil depth,root biomass decreases gradually;while along with the decrease of irrigation,root biomass in deeper soil showed a rising trend.