专用叶面营养对叶菜的增产效果及其机理研究

Study on the Effects of Special Foliage Nutrients

采用大田试验研究专用叶面营养液对主要叶菜的增产效果；并以芥菜为供试叶菜系统研究了专用叶面营养液对叶菜的增产机理。结果表明；专用叶面营养液可明显促进芥菜对Ｎ、Ｐ、Ｋ养分的吸收，提高叶片硝酸还原酶活性、叶绿素含量及光合速率，增加产量和改善品质。专用叶面营养液分别优于这种营养液中的营养物质和生长调节剂。芥菜喷施专用叶面营养液，与对照相比，叶绿素含量、光合速率、硝酸还原酶活性分别增加２０．２％、３６％、１．２０１μｇ／（ｇ·ｈ）；平均增产２４．６％；Ｖｃ、可溶性糖分别增加８７ｍｇ／ｋｇ和１．７ｇ／ｋｇ。

Field trials were conducted to study the effecls of special foliage nutrients (SFN) on greed vegetable yields and itsmechanisms. The results indicated that the uptake of N, P and K by green vegetables was promoted by using SFN. TheSFN increased chlorophyll content, NR activity and net photosynthetic rate of blade. Owing to the increases ofphysiological activities as above, the yields of green vegetables were increased by 16.8%~25.3% with 20.2% onaverage and the quality was improved as compared with control. The optimal diluted times of the SFN applied to greenvegetables was 300.