For the apple tree, the traditional method is to use base fertilizer in September or after harvesting fruit. According to the growth habits of Red Fuji apples, the authors conducted the following tests, and applied the same fertilizer one acre every 10 days from August 20 to October 10. In the spring of the second year of observation, the fertility of the three acres of land fertilized from August 20 to September 10 is almost the same, with early germination and full flower buds. After fertilizing on September 20, the later the fertilization,
For the apple tree, the traditional method is to use base fertilizer in September or after harvesting fruit. According to the growth habits of Red Fuji apples, the authors conducted the following tests, and applied the same fertilizer one acre every 10 days from August 20 to October 10. In the spring of the second year of observation, the fertility of the three acres of land fertilized from August 20 to September 10 is almost the same, with early germination and full flower buds. After fertilizing on September 20, the later the fertilization, the worse the growth. This proves that the best time for autumn schistosomiasis is from August 20 to September 10, just to verify the two vegetative stages in the growth habits of Red Fuji: the spring shoots use the nutrition of the previous year, from late May to June. The first cessation of the first trophic stage; the end of June to the use of leaves in the fall of the photosynthetic products of the year, the second trophic stage. Alternate growth on the tree and under the tree, when the spring shoot is stopped, the root system is in the growth peak, the roots are stopped, the autumn shoots begin to develop, and the autumn shoots stop and the root system is at the growth peak.
The author reviews the orchard diary in previous years, the red apple's autumn shooter stopped at about the end of September, which means that the root system is at the peak of growth at this time, and the autumn basal fertilizer should be deep-rooted and rooted, in order to make the peak of root growth. The fertility is fully absorbed, and the basal fertilizer must be applied before the root growth. Therefore, I believe that the red Fuji apple autumn basal fertilizer is the best before the end of August to mid-September.
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