Non-nuclear sand sugar orange fertilization points

The seedless sand sugar orange is mainly fertilized with organic fertilizer, and the fertilizer is rationally applied. Organic fertilizer rich mainly chicken, pig, cake, chicken, pig, etc. containing organic matter, generally is within 15 - 30%, after retting maturity, should be used for basal; Cake containing N, P, rich in K, and organic matter content high, about 75--85%, the good effect on the improvement of the fruit quality, maturity after retting mixed with fertilizer leaching facilities available as well. Inorganic fertilizer, that is, chemical fertilizer, mainly N fertilizer, P fertilizer, K fertilizer and compound fertilizer, fertilizer is generally easy to accommodate water, fertilizer effect is fast, nutrients are high, but not durable, nutrients are single, often used as top dressing. Trace elements (B, Zn, Mn, Mo, etc.) is necessary, affect shoot growth and fruit development, should be of Fertilization.

1 sprouting fertilizer ( 2 - April ). 15 days before the germination of spring buds , the main effect of fast-acting N fertilizer, combined with the application of P fertilizer.

2 stable fruit fertilizer ( 5 - June ). Fertilization after the first physiological fruit drop to the second physiological fruit drop (the young fruit is in the stage of fine and brittle division , requiring a large amount of N , P ), mainly based on N fertilizer, combined with application of P fertilizer, and at the same time spraying plus 0.5% urea fertilizer solution or 1% P 0.2% KH2P04.

3 strong fruit fertilizer ( July - September ). In this case it is the rapid expansion of the fruit, and also a substantial fall tree summer shoot incidence of pumping, pumping hair fall tree before 1-- administered 2 weeks, the administration of decomposition of organic fertilizer, in order to facilitate and improve fruit quality autumn shoot growth, Enrichment, and accumulation of nutrients in the tree.

â‘£ fruit picking fat (December - January the following year). Applying organic fertilizer mainly before or after fruit harvesting plays an important role in promoting plant recovery, increasing nutrients in various organs of the tree and improving the quality of flower bud differentiation.