There are many reasons for causing hollow fruit, the most important of which are three, one is lack of boron, boron deficiency leads to hollow fruit, which is white hair stem; second is excessive use of hormones, especially the amount of cytokinin is too large, so that the fruit The growth rate is too fast and the nutrient supply is insufficient. The third problem is excessive use of nitrogen fertilizer and unbalanced fertilization. Solution: In order to solve the problem of hollow fruit, we must first control the use of hormones, and try not to use as much of the bulking agent as possible. At the same time, balance fertilizer, control the amount of nitrogen fertilizer, supplement the use of potash and trace elements, and add 150 kg of Ciba-borax-zinc fertilizer when topdressing. /Acre + Jiayuan dihydrogen potassium 2 kg/mu, boron, zinc and potassium, 10-12 days once, even to recover the occurrence of hollow fruit 2 times; at the same time to strengthen the foliage fertilizer, with Watson calcium 750 times liquid + 1000 times spray of Rubio boron, spray 7-10 days, even spray 3 times, promote the expansion of boron fertilizer, alleviate the occurrence of pistachio, so that trace elements boron up and down the same supplement, from the fundamental solution of hollow fruit happened. Best Ultrasonic Cleaner,Teeth Cleaning Machine,Portable Ultrasonic Cleaner,Veterinary Ultrasonic Cleaner ZHEJIANG FOMOS MEDICAL TECHNOLOGY CO.,LTD. , https://www.ifomos.com