Pear fertilization technology management

One , more organic fertilizer , organic fertilizer to improve soil fertility in pear trees need to grow not only contains a variety of nutrients , and can improve soil structure , increase soil nutrient buffering capacity , increase soil water holding capacity , improve soil aeration , reduce soil resistance to root growth is conducive to the growth of pear trees .

Second, the nitrogen fertilizer nitrogen is greater nutrient requirements pear one . Production of 100 kg of nitrogen per fruit absorbs about 0.4 to about 0.6 kg of nitrogen . The use of nitrogen fertilizer on the growth and development of pear has a great impact. More appropriate in a range of nitrogen , an increase in the number of branches and leaves of pear , strengthen the role of tree vigor and increase production . However, if excessive nitrogen fertilizer will cause leggy shoots , fruit nutrition disorders caused not only induce calcium deficiency and other physiological occurrence of disease.

In the NPK , pear saplings more relative to the nitrogen , followed by potassium , phosphorus absorption less nitrogen is about 1 /5. Results , pear absorb the proportion of nitrogen and potassium saplings similar, but the increased uptake of phosphorus , nitrogen is about 1 /3. In fertilization should be different . Pear saplings period in general , according to the size of the tree , the amount of nitrogen fertilizer per year the amount of nitrogen in nitrogen Mushi count of 5 to 10 kg , after the result of the gradual increase to 15 to 20 kg , the individual needs more fertilizer varieties increased to 25 kg .

Pear nitrogen uptake by growing new shoots and young fruit enlargement period , followed by a second for the enlargement of the fruit ,backpack chemical sprayers the fruit after picking absorption is relatively small. Therefore, there are three main nitrogen fertilizer during the first period is the bud after fertilization before flowering certain amount of nitrogen topdressing can improve fruit setting rate , and promote the growth of foliage , leaf-fruit ratio helps to improve and maintain balance vegetative and reproductive growth , especially for the weaker saplings and tree vigor resulting tree foliage nitrogen fertilizer can help promote growth, enhance the role of tree vigor ; generally applied nitrogen fertilizer for the whole year is about 1/5 . But for the more prosperous fruit grower , generally not nitrogen fertilizer during this period to prevent excessive vegetative growth pear , affecting fruiting . The second period is the growth of new shoots Wang fertilization period, fruit enlargement period before the second , and with proper nitrogen fertilizer application of P and K , helps to increase productivity improve quality ; But do not topdressing prematurely , to prevent foliage the excessive vegetative growth , affecting pome fruit sugar content and quality ;low pressure sprayer this is about the year of fertilizer nitrogen fertilizer to 1/5 . The third period is the pome fertilization timely fertilizer before harvest the seeds for next spring and flowering prepare for the outcome ; generally about this period of the year nitrogen fertilizer applied to 1/ 5 . For more vigor weak and results pear, if not promptly after harvest chase Fertilizers , may be appropriate to re- apply a certain amount of nitrogen and phosphorus and potassium fertilizer to restore vigor , easing tree nutrient deficiency , pear growth for the coming year to prepare .