论文部分内容阅读
苹果贮藏期间的生理病害,主要有苦痘病、虎皮病、红玉斑点病和果肉褐变等。研究认为,苹果苦痘病的发生,主要是生长期偏施、多施氮肥,果实中氮、钙比过高造成的。因此,为了减轻贮藏期发病,要重视施肥技术的改进。要在增施有机质肥料,提高土壤钙氮比的基础上,控制氮肥施用量,特别要避免生长季中后期(7～8月份)偏施、多施氮素化肥。苹果谢花后4～5周内,喷布2次0.75％氯化钙液,或0.8％硝酸钙液,也有一定的
Physiological diseases during the storage of apple, mainly bitter pox disease, tiger skin disease, rubra spot disease and brown flesh. Studies suggest that the occurrence of apple bitter pox disease is mainly the partial growth during Shi, nitrogen fertilizer more, the fruit of nitrogen, calcium caused by too high. Therefore, in order to reduce the incidence of storage, should pay attention to the improvement of fertilizer technology. To increase the application of organic fertilizers, increase soil calcium-nitrogen ratio based on the control of nitrogen fertilizer rates, in particular, to avoid the mid-late growth season (July to August) partial application of nitrogen fertilizer. After 4 to 5 weeks of apples flowers, spray 2 times 0.75% calcium chloride solution, or 0.8% calcium nitrate solution, but also a certain amount of