How to manage the fruiting period in fuchuan navel orange?

My family has been growing oranges for decades. I don't know specific scientific about farming, but based on my years of experience, I want to say a few words. After picking the fruit, most of my farmyard manure and grass residue in the biogas digester were mixed with compound fertilizer to make the fruit redder and sweeter. The most fertilizer used by navel orange in a year is nitrogen fertilizer, followed by potassium fertilizer and phosphorus fertilizer. Every 1000 kg navel orange needs 6 kg nitrogen, 4 kg phosphorus 1. 1 kg potassium, and the ratio of nitrogen, phosphorus and potassium is 1: 0.2: 0.7. When navel oranges are picked from flowers to fruits, whether it is navel oranges or other fruit trees, the picked fertilizer is also called monthly fertilizer. I read two comments, both of which emphasize the use of multi-element fertilizers, yes, but they all ignore a problem. What is the basis of absorption, utilization and transformation of fertilizer application? Roots, of course.

Navel orange will enter the flower bud differentiation stage after fruit picking. Applying overwintering fertilizer on the basis of good postharvest fertilizer will promote flower bud differentiation, improve flower bud quality and strengthen flower bud, which is beneficial to flowering and fruiting in spring. Apply decomposed human and animal manure 15 ~ 20k g and pre-flowering fertilizer (spring fertilizer) to each tree: generally, it is applied from late February to early March, and the fertilization amount accounts for about 30% of the annual fertilization amount, mainly organic fertilizer and inorganic fertilizer; The available fertilizer is mainly nitrogen fertilizer, and phosphorus and potassium fertilizer are added.

After harvest, it is necessary to promote the growth of crop root system and plant nutrition, ensure the timely recovery of nutrition after fruit bearing, and lay the foundation for the coming year. Therefore, the use of high-phosphorus and high-nitrogen fertilizers is emphasized at this time. When is the best time to apply winter fertilizer to navel orange? In fact, before and after the flower bud differentiation of navel orange in 10, the best fertilization time for flower buds in the next year is September, 65438+ 10, and bio-organic fertilizer is ideal, that is, fertilization in winter is cold in winter. General crops should germinate in winter, which is the best time.

It is best to fertilize navel oranges after picking, but it is often too late to fertilize them immediately. Because of the busy work such as sales at hand, it is impossible to fertilize in time. Now that the solar term in beginning of winter has passed, winter will come slowly, cold air will patronize from time to time, and navel oranges will make winter fat urgent.