矮壮素浸种对木薯苗期生长的影响  

Effect of Soaking Cuttings with Chlormequat on Manihot esculenta Crantz Growth at the Seedling Stage

作　　者：魏云霞[1] 李天[1,2] 黄洁 王娟[1,2] WEI Yunxia;LI Tian;HUANG Jie;WANG Juan(Tropical Crops Genetic Resources Institute,CATAS/Keys Laboratory of Protection and Utilization of Cassava Germplasm Resources,Ministry of Agriculture and Rural Affairs,Haikou 571101,China;Institute of Tropical Agriculture and Forestry,Hainan University,Haikou 570228,China)

机构地区：[1]中国热带农业科学院热带作物品种资源研究所/农业农村部木薯种质资源保护与利用重点实验室,海口571101 [2]海南大学热带农林学院,海口570228

出　　处：《种子》2024年第5期16-23,共8页Seed

基　　金：财政部和农业农村部:国家现代木薯产业技术体系(CARS-11-hnhj)。

摘　　要：为改进木薯种茎的矮壮素浸种技术,设置不浸种、不同浓度矮壮素(0、50 mg/L、100 mg/L、200 mg/L、300 mg/L)浸种、不同浸种时长(6 h、12 h),研究其对袋栽木薯幼苗根、茎、叶的生长及土壤酶活性的影响。结果表明,与不浸种比较,100~200 mg/L浸种6 h和12 h显著增粗茎径;200 mg/L浸种6 h、50 mg/L浸种12 h均显著提高总根长,并增粗细根根径。其中,总根长增幅分别达22.69%~31.33%、27.38%~36.86%,细根根径增幅分别达10.53%~20.29%、17.11%~20.29%;100~200 mg/L浸种6 h和50~100 mg/L浸种12 h显著提高茎叶干重和膨大根干重;50~200 mg/L浸种6 h显著提高细根干重32.77%~76.76%,50~100 mg/L浸种12 h显著提高细根干重25.54%~71.83%;100~200 mg/L浸种6 h和50~100 mg/L浸种12 h显著提高薯干淀粉含量;100~200 mg/L浸种6 h和50~100 mg/L浸种12 h有效提高土壤脲酶活性,100~200 mg/L浸种6 h和12 h均提高土壤酸性磷酸酶活性。50~200 mg/L矮壮素溶液浸泡木薯种茎6 h,能较好促进木薯苗的根、茎、叶生长,并提高土壤的脲酶和酸性磷酸酶活性。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 diameter 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 cuttings 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.

关 键 词：木薯 矮壮素 浸种 

分 类 号：S533[农业科学—作物学]