地膜覆盖对春玉米硫、钙、镁吸收、分配的影响

THE EFFECT OF COVERED WITH FILM ON S.Ca.Mg. ABSORPTION AND DISTRIBUTION OF SPRING MAIZE

本项研究查明 :地膜覆盖显著增加 S、Ca、Mg的吸收累积量 ,成熟期分别增长 15 %、2 2 %、2 2 % ,大口期增10 8%、79%、85 % ;使吸收数量最多的时期由大口至吐丝期提前到拔节至大口期 ;使 S、Ca、Mg最快吸收速率分别提高 17.6 %、15 .3%、19.5 % ,最快吸收速率出现时间分别提早 5 d、1d、14d;成熟期 S、Ca、Mg运转率分别为 6 1%、18%、39% ,分别提高 4、4、1个百分点 ;使 S、Ca、Mg生产效率分别达 6 10、16 8、2 79,分别提高 18、4、8,而 S和

This study shows that:The quantity of S.Ca.Mg.absorption and accumulation is significantly increased by coveved with film and it is respectively increased by 15、22、22 per cent at maturing period,and it is respectively increased by 108、79、85 per cent during floret differentiation period in female ear.The most quantity of absorption appeared ahead of time and it appeared at jointing to during floret differentiation period in female ear.The fastest absorption rate of S.Ca.Mg.is respectively increased by 17.6、15.3、19.5 per cent,and its time appeared earlier 5、1、14 days,respectively.At maturing period,the translocation rate of S.Ca.Mg.is 61、18、39 per cent and it is increased by 4、4、1 per cent,respectively.The productivity of S.Ca.Mg.is 610、168、279 and it is increased by 18、4、8 per cent,respectively.Film also increased the consumption coefficient of S.and Mg.