Spring corn
First, the northeast cold spring corn area
(1) Recommended 14-18-13 (N-P2O5-K2O) or similar formula.
(2) The production level is 500~600 kg/mu, the recommended dosage of formula fertilizer is 23~28 kg/mu, and the application rate of urea in the seven-leaf stage is 11~13 kg/mu. (3) The production level is 600~700 kg/mu, the recommended dosage of formula fertilizer is 28~32 kg/mu, and the urea in the seven-leaf stage is 13~16 kg/mu.
(4) The production level is above 700 kg/mu, the recommended dosage of formula fertilizer is 32~37 kg/mu, and the application of urea in the seven-leaf stage is 16~18 kg/mu.
(5) The production level is below 500 kg/mu, the recommended dosage of formula fertilizer is 18~23 kg/mu, and the application rate of urea in the seven-leaf stage is 9~11 kg/mu.
Second, the semi-humid spring corn area in Northeast China
1. Base chasing combined fertilization recommendations:
(1) Recommended 15-18-12 (N-P2O5-K2O) or similar formula.
(2) The production level is 550~700 kg/mu, the recommended dosage of formula fertilizer is 24~31 kg/mu, and the large flare period is 13~16 kg/mu.
(3) The production level is 700~800 kg/mu, the recommended dosage of formula fertilizer is 31~35 kg/mu, and the large flare period is about 16~18 kg/mu.
(4) The production level is above 800 kg/mu, the recommended dosage of formula fertilizer is 35~40 kg/mu, and the large flare period is about 18~21 kg/mu.
(5) The production level is below 550 kg/mu, the recommended dosage of formula fertilizer is 20~24 kg/mu, and the large flare period is about 10~13 kg/mu.
2. One-time fertilization advice:
(1) Recommended 29-13-10 (N-P2O5-K2O) or similar formula.
(2) The production level is 550~700 kg/mu, and the recommended dosage of formula fertilizer is 33~41 kg/mu, which is used as a base fertilizer or seedling stage top dressing.
(3) The production level is 700~800 kg/mu, and 30% release period is required for 50~60 days of slow-release nitrogen release. The recommended dosage of formula fertilizer is 41~47 kg/mu, which is used as a base fertilizer or seedling stage top dressing. .
(4) The production level of 800 kg/mu or more requires a 30% release period of 50-60 days of slow-release nitrogen release, and the recommended dosage of formula fertilizer is 47-53 kg/mu, which is used as a base fertilizer or seedling stage top dressing.
(5) The production level is below 550 kg/mu, and the recommended dosage of formula fertilizer is 27~33 kg/mu, which is used as a base fertilizer or seedling stage top dressing.
Third, the semi-arid spring corn area in Northeast China
(1) Recommended 13-20-12 (N-P2O5-K2O) or similar formula.
(2) The production level is 450~600 kg/mu, the recommended dosage of formula fertilizer is 25~33 kg/mu, and the large flare period is 10~14 kg/mu.
(3) The production level is above 600 kg/mu, the recommended dosage of formula fertilizer is 33~38 kg/mu, and the large flare period is about 14~16 kg/mu.
(4) The production level is below 450 kg/mu, the recommended dosage of formula fertilizer is 19~25 kg/mu, and the large flare period is about 8~10 kg/mu.
Fourth, the northeast warm and humid spring corn area
(1) Recommended 17-17-12 (N-P2O5-K2O) or similar formula.
(2) The production level is below 500 kg/mu, the recommended dosage of formula fertilizer is 20~24 kg/mu, and the large flare period is about 11~14 kg/mu.
(3) The production level is 500~600 kg/mu, the recommended dosage of formula fertilizer is 24~29 kg/mu, and the large flare period is about 14~16 kg/mu.
(4) The production level is 600~700 kg/mu, the recommended dosage of formula fertilizer is 29~34 kg/mu, and the large flare period is about 16~19 kg/mu.
(5) The production level is above 700 kg/mu, the recommended dosage of formula fertilizer is 34~39 kg/mu, and the urea is applied at 19~22 kg/mu.
This article URL: Spring Fertilization Guidance for Major Crops in Spring (1818)
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