为什么幼树秋季喷钾能防抽条答新疆读者魏庆生果树喷钾可增强光合作用强度，增加有机养分积累，促进枝条加粗生长，使枝条内束缚水含量增加，自由水／束缚水比值降低，从而增加枝条抗性，预防或减轻抽条现象发生。据试验，苹果幼树于９月上旬、中旬喷２次磷酸二氢钾３００... Sprayed potassium in fruit trees in autumn can enhance the photosynthesis intensity, increase the accumulation of organic nutrients and promote the thick growth of shoots, so that the content of irreducible water in shoots increases and the ratio of free water / irreducible water decreases , Thereby increasing the resistance of shoots to prevent or reduce the occurrence of splicing. According to the test, young apple trees in early September, spray 2 times in the middle of potassium dihydrogen phosphate 300 ...