喷布钼酸铵矫治钠过量引起的槾桔黄斑落叶

Check of "Leaf Yellow Spot', A Physiological Disorder of Manju (Citrus reticulata Blanco) Caused by High Sodium Content, through Spraying Ammonium Molybdate

近年在浙江黄岩桔区初结果的槾桔树上出现大量的黄斑叶、焦叶及严重的落叶现象,喷布钼酸铵500ppm液矫治效果极为显著。喷施钼酸铵不仅能消除黄斑,提高叶片质量,防止焦叶和落叶,还能促进新梢及根系生长,并有利于果实发育和外观内质的提高,对翌年着果率及产量的提高亦有明显效果。叶分析结果还表明,槾桔黄斑并非缺钼引起,而主要是高钠环境引起叶钠含量过高所致,喷钼酸铵后,叶片钠含量大幅度降低,从42.9ppm降至5.9ppm(无黄斑正常叶为4.6ppm)。

Yellow-spotted leaves scorching and lear deterioration occured on Manju in Huangyan county of Zhejiang province in recent years. The spraying of 500ppm ammonium molybdate was effective for the check of the above mentioned symptoms, enhancing the growth of new shoots and roots as a result of improving the fruit quality, and also increasing the fruit set and yield in the next year. The results of leaf analysis showed that yellow-spotted leaves in Manju is caused by excessive Na level. Leaf Na level decreased from 42.9 ppm before the treatment to 5.9 ppm after the treatment, as compared with 4.6 ppm in normal leaves.