Potato fertilization techniques

Potatoes, also known as potatoes;It is both food and vegetables, it is drought tolerant, like cold, early spring using the greenhouse double film cultivation technology,Can be on the market early adjustment supplement vegetable off-season.

I. nutritional characteristics

Potato is a kind of crop which is tolerant to fertilizer and fond of potassium.To nourish nitrogen, phosphorus, and potassium throughout the growth process
Potassium is the most, nitrogen is the second, phosphorus is less.According to the test, for every 100 kilograms of potato tubers produced, about the need to absorb
Five kilograms of nitrogen, two kilograms of phosphorus, and ten kilograms of potassium.It requires twice as much potassium as nitrogen and five times as much phosphorus

The precondition of stable production.Nitrogen can promote the growth of stem and leaf and the accumulation of starch and protein in tubers.Phosphorus promotes plant growth and health

Zhuang, improve tuber quality and storability, increase starch content and yield.Potassium promotes the accumulation of starch in tubers at the later stage of potato growth

Tired, improve plant disease resistance and cold tolerance.In addition, the potato is more sensitive to boron, zinc, boron is conducive to potato block expansion, preventCracking has special effect on improving net photosynthetic productivity of plants.

Potato is more sensitive to chlorine crops, if the chlorine element exceeds the standard, affect the formation and accumulation of starch, affect the quality of tubers.

Plant potato had better choose the fertilizer of potassium sulphate type.

Second, fertilization technologyBase fertilizer: potato like the climate is cool, deep soil layer, loose, fertile sand soil.Base fertilizer dosage generally accounts for the total

More than 2/3 of the amount of fertilizer applied, on the basis of the application of farm fertilizer, each mu applied Stanley potassium sulfate compound fertilizer (17-17-17) or Special fertilizer for potato (17-6-22) 40-60 kg, combined with deep or ridged application.Seed and fertilizer should be separated by 8-10Cm, avoid direct contact between seed potato and fertilizer, causing burning seed.

Topdressing: potato topdressing early.In seedling stage, Stanley high nitrogen compound fertilizer (25-15-5, 30-5-5) can be combined

Tillage with urea 10-15 kg per mu of water, is conducive to protecting seedlings.About 50 days after sowing, mu chase Stanley high nitrogen highPotassium compound fertilizer (17-6-22, 20-5-20)25-30 kg, to promote early potato, more potato.

Leaf surface fertilizer: after potato blossom, general no longer undertake rhizosphere topdressing.In particular, do not apply topdressing nitrogen fertilizer, if there is fertilizer deficiency
Leaf surface topdressing can be carried out.If nitrogen is lacking, spraying 0.2-0.3% urea 50 kg on mu of leaves;If lack of phosphorus, potassium, leaf area spray 0.3-0.5%
50 kg of potassium dihydrogen phosphate solution;If lacking boron or zinc, spray 0.1-0.3% borax or zinc sulfate 50 kg on the leaves of mu;

Foliar fertilizer is sprayed every 10-15 days commonly, be sprayed continuously twice.