Apple Pear Applied Potassium Fertilization And Coverage Of The Combined Effect Of The Study

Rational application of potash fertilizer on the basis of yearly applying nitrogenous and phosphate fertilizer to every apple-pear tree can speed up the growing of the branches and leaves, improve the ratio of fruit-bearing, increase the potassium content of the fruit and leaves, enlarge the fruit, put on the weight of each fruit, improve the yield and quality of the apple-pear. It is tested that it is in summer that the effect of applying potash fertilizer are the best and then in autumn. The appropriate proportion of nitrogenous and phosphate and potash fertilizer is 1:0.5:1.After the handling the root cap by straw-mulching and plastic-mulching, it is very clear that the moisture content is significantly increased, that the branches and leaves are accelerated to grow, that the yield and quality of the fruit are developed. Plastic-mulching can bring about a striking effect to the rise in the temperature and moisture-keeping. By straw-mulching, the soil temperature is lower in the early growing period but drops slower in the late period that is conducive to the resolving of organic matters and the growing of the root system. Straw-mulching develops the soil porosity and makes the soil well-ventilated. Compared with the plastic-mulching, the straw-mulching is more appropriate.