摘要
对收获期裸苗移栽、营养钵育苗移栽和直播棉花的成熟棉株根系形态特征进行了剖面观察,发现裸苗移栽棉株的侧根向四周呈伞面放射状生长,可见粗而健壮的优势侧根6～8条.株-1;营养钵移栽棉株的侧根多向一侧呈鸡爪状极性伸展,可见优势侧根1～2条或2～3条;直播棉花为典型的直根系。经测定,裸苗移栽棉花一级侧根条数44条.株-1,分别比营养钵移栽和直播棉的多15.8%和37.5%;根直径0.31cm,分别比营养钵移栽和直播棉的粗20.5%和88%;根干重31.9g.株-1,分别比营养钵移栽和直播棉的重22.2%和75.3%。
The morphological parameters of the adult plant root system of the root-naked transplanting cotton （RNTC） was compared in the fields with the soil-cubes transplanting cotton （SCTC） and the direct seeding cotton （DSC） by observing the distribution of root system at each soil profile in layer 0 ～170 cm. Results showed that lateral roots of RNTC grew actinomorphicly, there about six to eigth dominant thick and strong lateral roots. Lateral roots of SCTC spread anisomerously to one side like the paw of a chicken, with about one to two or two to three dominant lateral roots. The root system of DSC was typical taproot system. The survey indicated that mean numbers of primary lateral roots of RNTC was 44 per plant, more than SCTC and DSC by 15.8% and 37.5% each（ F=33.24〉F0.01 = 5.49）. Mean diameter width of the primary lateral roots of RNTC was 0.31 cm, wider than SCTC and DSC by 20.5% and 88% each （F=249.01）F0 01 =5.49）; Mean dry weight of whole root system of RNTC was 31.9 g · plant^-1 , heavier than SCTC and DSC by 22.2% and 75.3% each （F=84.31〉 Fo. ol =5.49）.
出处
《棉花学报》
CSCD
北大核心
2008年第1期76-78,共3页
Cotton Science
基金
农业科技跨越计划专项资金(2005跨12)
科技成果转化资金项目(05EFN216900348)
中央级公益性科研院所基本科研业务专项(SJA0609)
关键词
棉花
根系
植物生长调节
剖面
G. hirsutum L.
root systems plant growth regulator
complete distribution at soil profile
