摘要
为探索磷硼营养对西瓜苗期抗寒性的影响,为西瓜幼苗期养分管理提供依据,选用当地主栽品种-京欣一号为材料,采用营养液培养,设置缺磷、缺硼、缺硼磷及施硼磷4个处理,3叶1心时进行5d低温及常温处理。结果表明,硼磷配合在低温下POD活性比常温下同一处理上升72.06%,但无论常温或低温施加磷、硼及其配合处理POD活性比对照下降;脯氨酸含量增加幅度高达260.01%,而缺硼磷处理仅上升191.18%;硼磷、硼、磷和不施硼磷的MDA含量较常温下分别上升27.84%、33.33%、33.01%和36.63%;缺硼磷处理电导率与硼磷配合比升高43.61%;磷、磷硼配合处理糖含量增加幅度较缺硼磷处理达极显著水平。总体而言,磷硼配合更有利于提高西瓜幼苗抗寒性。
Watermelon seedlings are vulnerable to cold weather in early spring in the area of middle and lower reaches of the Yangtze River. In order to explore the effect of nutrient on watermelon seedlings＇ cold resistance, experiment was conducted with the seedlings of Jingxin 1 watermelon cultivar cultured in nutrient solution. 4 treatments were taken, including no phosphorus, no boron, no phosphorus and boron and applying boron and phosphorus. When the seedlings grew to the stage of 3 leaves, low temperature and normal temperature treatments were conducted for 5 days. And subsequently, tests were made for POD activation, the contents of Pro, MDA and soluble sugar, and EC. Results showed that jointly applied boron and phosphorus at seedling stage could effectively reduce the activity of MDA and POD. And meanwhile, the membrane injury percentage （MIP） reduced dramatically. Additionally, it could increase the contents of Pro and soluble sugar, which is beneficial to increase the cold resistance of watermelon seedlings.
出处
《果树学报》
CAS
CSCD
北大核心
2007年第6期815-819,共5页
Journal of Fruit Science
基金
湖北省攻关重点项目(2005AA208B04)
关键词
西瓜
磷
硼
低温
抗寒性
生理生化特性
Watermelon
Phosphorus
Boron
Low temperature
Cold resistance
Physiological and biochemical characteristics
