盐钙胁迫下大白菜干烧心病的发生及矿质营养分配  

EFFECTS OF CALCIUM AND SALT STRESS ON TIPBURN AND NUTRITION DISTRIBUTION OF CHINESE CABBAGE

作　　者：王五宏[1] 钟新民[1] 李必元[1] 陈红波[2] 

机构地区：[1]浙江省农业科学院蔬菜研究所,浙江杭州310021 [2]浙江大学农业与生物技术学院,浙江杭州310029

出　　处：《核农学报》2012年第8期1204-1208,共5页Journal of Nuclear Agricultural Sciences

基　　金：浙江省重大科技攻关项目(2009C02006-1);浙江省蔬菜产业科技创新团队项目(2009R50026)

摘　　要：以大白菜抗、感干烧心病自交系(C8、651A)及其杂交种F1代(651AXC8,C8X651A)为试验材料,进行无钙营养液和100mmol.L-1NaCl处理,20d后调查植株的矿质元素含量、干重和发病率。结果表明,苗期营养液无钙处理比根际盐胁迫更容易导致大白菜干烧心病的发生,无钙处理下651A的发病率显著高于盐胁迫处理,且叶柄和叶片中钙含量与干烧心病发生正相关,正反交均能提高品种抗性。盐钙处理均抑制了氮磷钙的吸收,盐处理下品系651A叶片的氮、磷、钙吸收抑制率分别为25.43%、22.00%、31.18%;无钙处理使叶柄中钾镁含量显著增加,651A叶柄中钾镁含量分别比对照增加51.00%和12.08%;抗病品系651A和正反交F1代的钙钠含量均显著高于感病品系C8。In the study,Chinese cabbage inbred lines and their hybrids varieties being resistant and susceptive to tipburn were cultivated in calcium-free nutrient solution and 100 mmol·L-1 of NaCl nutrient solution,respectively,to investigate the growth characteristics of plants including mineral elements contents,dry weight and morbidity after 20d.Results showed that plants under calcium-free treatment were more easily led to tipburn than those under salt stress at the seedling stage.The incidence of 651A varieties with calcium-free nutrient solution was significantly higher than those under salt stress,and the calcium content of petioles and leaves was a positive correlation with the occurrence of tipburn.Hybrids can also improve resistance to tipburn.Moreover,the absorption of nitrogen,phosphorus and calcium in plants was inhibited under salt stress or calcium-free treatments.Inhibition rates of 651A varieties′ leaf absorbing nitrogen,phosphorus and calcium were 25.43%,22.00% and 31.18% in the salt stress treatment,respectively.In addition,calcium-free treatment greatly improved the contents of potassium and magnesium in the petioles by 51.00% and 12.08% than control samples,especially for 651A varieties.Levels of calcium and sodium in hybrids and resistant varieties were significantly higher than those in the susceptible varieties.

关 键 词：大白菜 干烧心 盐钙胁迫 品系 

分 类 号：S436.341[农业科学—农业昆虫与害虫防治]