摘要
本文研究了主要栽培因子(品种、氮肥、钾肥和植株密度等)对早稻纹枯病的影响。结果表明:纹枯病的发展随施氮量的增加而加重,其敏感点为纯氮7.5~12.5kg/667m2;品种间抗感差异明显,其感病程度可分为3类,浙辐802和先锋一号发病轻为Ⅰ类;二九丰和湘早籼3号为Ⅱ类;二九青和双矮早发病较重为Ⅲ类。品种与施氮量互作效应对病情发展影响显著;氮、钾肥和植株密度对纹枯病进展速率的影响是氮肥>植株密度>钾肥。其交互作用明显的是氮肥和钾肥的互作。
This paper deals with the effects of main culture factors(rice variety, nitrogen and
potash fertilizer,density) on rice sheath blight(RSB).The results showed that the effect of N
fertilizer was sig-nificant,the sensitive point of effect of N fertilizer to RSB was
7.5-12.5kg/667m2 of pure nitrogen.The resistance and susceptibility of varieties were different
and could be eparated into 3 ranks :type Ⅰ was light access including Zhefu 802 and Pioneer
1;type Ⅲ was heavy access including Erjiuqing and Shuang-aizhao ; type Ⅱ was between
type Ⅰ and Ⅲ including Erjiufeng and Xiangzhaoxian 3. The interaction of various factors on
RSB were also studed.
出处
《植物保护》
CAS
CSCD
北大核心
1995年第5期7-10,共4页
Plant Protection
关键词
水稻
纹枯病
栽培因子
交互作用
病情发展
rice sheath blight , culture factor, cross reaction, diseas
development.