Effect of Soaking Cuttings with Chlormequat on Manihot esculenta Crantz Growth at the Seedling Stage
In order to improve the cutting soaking technique with chlormequat of Manihot esculenta Crantz cuttings,different concentrations of chlormequat(0,50 mg/L,100 mg/L,200 mg/L,300 mg/L)were immersed in cuttings and that without soaking,and different duration of soaking(6 hours,12 hours)were set to study the effects of soaking on root,stem and leaf growth and soil enzyme activity of bagged Manihot esculenta Crantz seedlings.The results showed that the stem di-ameter from 100 mg/L to 200 mg/L soaked cuttings increased significantly for 6 hours and 12 hours compared with non-soaked cuttings.Soaking cuttings at 200 mg/L for 6 hours and 50 mg/L for 12 hours significantly increased total root length and increased root diameter,of which the total root length increased by 22.69％to 31.33％and 27.38％to 36.86％,and the diameter of fine root increased by 10.53％to 20.29％and 17.11％to 20.29％,respectively.Soaking cuttings from 100 mg/L to 200 mg/L for 6 hours and from 50 mg/L to 100 mg/L for 12 hours significantly increased stem and leaf dry weight and expanded root dry weight.Soaking cuttings from 50 mg/L to 200 mg/L for 6 hours significantly increased the dry weight of fine roots by 32.77％to 76.76％,soaking cuttings from 50 mg/L to 100 mg/L for 12 hours significantly increased the dry weight of fine roots by 25.54％to 71.83％.Soaking cuttings from 100 mg/L to 200 mg/L for 6 hours and from 50 mg/L to 100 mg/L for 12 hours significantly increased the amount of dry starch in Manihot esculenta Crantz.Soaking cut-tings from 100 mg/L to 200 mg/L for 6 hours and from 50 mg/L to 100 mg/L for 12 hours effectively increased soil urease activity,soaking cuttings from 100 mg/L to 200 mg/L for 6 hours and 12 hours increased soil acid phosphatase activity.The roots,stems and leaves of Manihot esculenta Crantz seedlings were well promoted and the activities of urease and acid phosphatase in soil were improved by soaking Manihot esculenta Crantz seed stems with 50 mg/L to 200 mg/L chlormequat solution for 6 hours.
NETL
NSTL
万方数据
