摘要
根据小麦孢囊线虫病典型症状———根部形成瘿瘤及其密度变化 ,探讨了该病害对小麦苗期生长影响。结果表明 :瘿瘤密度与麦苗长势呈极显著负相关 ;瘿瘤密度在 0 2 1～ 1 83,麦苗主茎高降低 2 7 5 %～ 4 5 4 % ,单株分蘖减少 4 3%～ 77 0 % ,叶片减少 7 9%～ 6 5 7% ,次生根条数及根长分别减少 1 3%～ 6 1 6 % ,8 0 %～ 71 9%。瘿瘤密度达 4 2 2以上时 ,麦苗不能形成分蘖和次生根 。
The cereal cyst nematode disease and its influence on seedling growth in wheat were studied in this paper.The typical symptom of the disease appeared that root knots(nematode gall)are formed at branching part of roots.The result of investigation on root knots caused by the nematode disease showed a highly significant negative correlation between root knot densities and seedling growth vigor in wheat.As root knot density gradually increased from 0 21 to 1 83,the height of main stem,length of roots,no.of tiller,leave and secondary root per plant have decreased by 27 5%-45 4%,8 0%-71 9%,4 3%-77 0%,7 9%-65 7% and 1 3%-61 6%,respectively.When the density reached 4 22 above,the seedlings becoming very weak and yellow can not produce tiller and secondary roots and died early.
出处
《华北农学报》
CSCD
北大核心
2002年第2期66-69,共4页
Acta Agriculturae Boreali-Sinica
关键词
小麦
孢囊线虫病
瘿瘤密度
麦苗生长
Wheat
Heterodera avenae woll
Root knot density
Growth vigor
