覆膜对不同熟期大豆品种根系生长的影响

为研究覆膜栽培下不同熟期大豆品种根系生长的变化规律。在田间以黑河26、新豆8号、吉育60为材料,分别设覆膜和露地共6个处理,研究了覆膜对早、中、晚熟品种根系生长及活力影响。结果表明,覆膜后根干重、侧根数、伤流量、单株根瘤数及单株根瘤干重明显增加,根系活力显著增强,中、晚熟品种新豆8号和吉育60的增幅明显大于早熟品种黑河26,早、中、晚熟在覆膜栽培下的增产幅度依次为7.44%,11.96%,23.01%,中晚熟品种增产幅度大,是覆膜促进其前、中期根系生长和活力提高作用更显著的结果。

Effects of Covered Film on Root Growth of Soybean Varieties with Different Maturation Period

The main object of the study was to discuss the change regularity of the root growth of soybean varieties with different maturity periods, taking Heihe 26 ,Xindou 8,Jiyu 60 as materials,designing 6 treatments with filmed and bared to study the effect of covered film on root growth and activity of soybean vaieties of early-maturing variety, mid-maturing variety and late-maturing varity. The result demonstrated that root system dry weight, rate of leteral root, volume of bleeding, nodule number per plant, number of tumor and nodule dry weight per plant were significantly increased. The activity of root were developed. The yield of soybean Xindou 8 and Jiyu 60 were increased more than that of Heihe 26. The order of increased yield of 3 varieties was 7.44% ,11.96% ,23.0%. The yield of mid-maturing variety and late-maturing variety were the most obviously increased, because the covered film was accelerated early and the root growth in middle period and the activity improvement were developed more obviously.