摘要
1984～1987年对小麦不同品种、密度和施氮水平下根系发生规律进行观察.结果表明:主茎叶片出生与各叶节次生根开始发生存在(n-3)的同伸关系.各叶节发根力随节位提高而增强.芽鞘节、分蘖鞘节、主茎的1～4叶节和分蘖的1～2叶节一般发根1～2条,其余各叶节可发根2～6条,抱茎叶节最多可发根6～8条.不同密度和施氮量主要影响最上3个叶节的发根力.
The rule of wheat root development under different seedling denasities and nitrogen supplies was studied with three cultivars in 1984～1987. The results were as follows: The relationship between leaf emergence and rooting was 'n-3' i. e. the roots on 'n-3' node happened while nth leaf emergenced, The rootability of each node on the same stem and tiller increased with the rising of the node. There were usual- ly 1-2 roots on coleoptilar node, tiller sheath node. and 1st to 4th leaf nodes, as well as 1st to 2nd leaf nodes of tillers. 2-6 roots on the rest of nodes. As many as 6-8 roots could be produced on the uppermost rooting node. The rootability of the uppermost three rooting nodes in main stem and tillers was greatly af- fected by different seedling densities and nitrogen supplies.
出处
《江苏农学院学报》
CSCD
1992年第4期1-5,共5页
Jiangsu Agricultural Research
关键词
小麦
根系
发生
Wheat
Seminal root
Nodal root
