(1) Fertilization Division China's new fertilizer network: According to the regional and production layout, China's main wheat production is divided into five major regions, namely: Northeast Spring Wheat Region, Northwest Wheat Region, North China Winter Wheat Region, Middle and Lower Reaches of the Yangtze River, Winter Wheat Region and Southwest Wheat area. According to the climatic conditions, cultivation conditions and soil conditions in the region, it is further subdivided into 7 sub-regions, which cover 99% of the total wheat area in the country. The specific distribution is as follows:
I Northeast Chunmai District: Some cities and counties in the west of Heilongjiang Province, northeast of Inner Mongolia Autonomous Region.
II-1 Northwest rain-fed wheat area: north of Hebei Province, northern part of Beijing, southern Wulanchabu City of Inner Mongolia Autonomous Region, most of Shanxi Province, northern Shaanxi Province, western Henan Province, northern Ningxia Hui Autonomous Region, eastern Gansu Province.
II-2 Northwestern irrigated wheat area: central part of Inner Mongolia Autonomous Region, northern part of Ningxia Hui Autonomous Region, central and western Gansu Province, eastern Qinghai Province, Xinjiang Xinjiang Uygur Autonomous Region.
III-1 Irrigation Winter Wheat Region in North China: Shandong Province and Tianjin City, Central and Southern Hebei Province, Central and Southern Beijing, Central and Northern Henan Province, Guanzhong Plain of Shaanxi Province, South of Shanxi Province.
III-2 North China rain-fed winter wheat area: north of the Huaihe River in Jiangsu and Anhui provinces, southeast of Henan Province.
IV Winter wheat in the middle and lower reaches of the Yangtze River: Hubei, Hunan, Jiangxi, Zhejiang and Shanghai, all of the five provinces (cities), south of Henan Province, Anhui Province and Jiangsu Province, south of the Huaihe River.
V Southwest wheat area: Chongqing, Sichuan, Guizhou and Yunnan all four provinces and southwestern Shaanxi.
(II) Suggestions for large formulas and fertilization in different regions
1 Northeast spring wheat area recommended formula: 12-20-13 (N-P2O5-K2O) or similar formula.
Fertilization recommendations: (1) The production level is 250-350 kg/mu, the recommended dosage of formula fertilizer is 14-20 kg/mu, and the period from the start-up period to the jointing stage is combined with irrigation and urea is 7-10 kg/mu; (2) the production level is 350- 450 kg / mu, the recommended dosage of formula fertilizer 20-26 kg / mu, from the start-up period to the jointing stage combined with irrigation and urea 10-13 kg / mu; (3) the output level of 450 kg / acre, the recommended dosage of formula fertilizer 26- 31 kg/mu, from the period of the body to the jointing stage, combined with irrigation and topdressing urea 13-16 kg/mu; (4) the production level is below 250 kg/mu, the recommended dosage of formula fertilizer is 9-14 kg/mu, and the combination is from the beginning to the jointing stage. Irrigation and application of urea 4-7 kg / mu.
2 Northwest wheat area 2.1 Northwest rain-fed wheat field recommended formula: 28-12-5 (N-P2O5-K2O) or similar formula.
Fertilization recommendations: (1) the production level is 250-350 kg/mu, the recommended dosage of formula fertilizer is 24-33 kg/mu, which is applied as a base fertilizer at one time; (2) the production level is 350-500 kg/mu, and the recommended dosage of formula fertilizer is 33- 48 kg/mu, as a base fertilizer for one-time application; (3) The production level is above 500 kg/mu, the recommended dosage of formula fertilizer is 48-57 kg/mu, which is applied as a base fertilizer at one time; (4) The production level is below 250 kg/mu. The recommended dosage of formula fertilizer is 14-24 kg/mu, which is applied as a base fertilizer at one time.
2.2 Recommended formula for Northwest Irrigation Wheat Area: 17-18-10 (N-P2O5-K2O) or similar formula.
Fertilization recommendations: (1) The production level is 300-400 kg/mu, and the recommended dosage of formula fertilizer is 19-25 kg/mu. From the start-up period to the jointing stage, combined with irrigation and urea, 11-15 kg/mu; (2) Yield level 400- 550 kg / mu, the recommended dosage of formula fertilizer is 25-35 kg / mu, from the start-up period to the jointing stage combined with irrigation and urea 15-20 kg / mu; (3) the production level of 550 kg / mu or more, the recommended dosage of formula fertilizer 35- 41 kg/mu, from the period of the body to the jointing stage, combined with irrigation and 20-24 kg/mu of urea; (4) the output level is less than 300 kg/mu, the recommended dosage of formula fertilizer is 13-19 kg/mu, and the combination is from the beginning to the jointing stage. Irrigation and urea application 7-11 kg / mu.
3 North China Winter Wheat Area 3.1 North China Irrigation Winter Wheat Area Recommended formula: 15-20-12 (N-P2O5-K2O) or similar formula.
Fertilization recommendations: (1) the production level of 400-500 kg / mu, the recommended dosage of formula fertilizer 24-30 kg / acre, from the start-up period to the jointing stage combined with irrigation and urea 13-16 kg / mu; (2) the production level of 500- 600 kg / mu, the recommended dosage of formula fertilizer is 30-36 kg / mu, from the start-up period to the jointing stage combined with irrigation and urea 60-20 kg / mu; (3) the output level of 600 kg / mu or more, the recommended dosage of formula fertilizer 36- 42 kg/mu, from the period of the body to the jointing stage, combined with irrigation and 20-24 kg/mu of urea; (4) the output level is below 400 kg/mu, the recommended dosage of formula fertilizer is 18-24 kg/mu, and the combination is from the beginning to the jointing stage. Irrigation and application of urea 10-13 kg / mu.
3.2 North China rain-fed winter wheat area 3.2.1 base chasing combined fertilization program recommended formula: 18-15-12 (N-P2O5-K2O) or similar formula.
Fertilization recommendations: (1) the production level of 350-450 kg / mu, the recommended dosage of formula fertilizer 28-36 kg / acre, from the start-up period to the jointing stage combined with irrigation with urea 9-12 kg / mu; (2) production level 450- 600 kg / mu, the recommended dosage of formula fertilizer is 36-47 kg / mu, from the start-up period to the jointing stage combined with irrigation and urea 12-16 kg / mu; (3) the output level of 600 kg / mu or more, the recommended dosage of formula fertilizer 47- 55 kg/mu, from the period of the body to the jointing stage, combined with irrigation and urea, 16-19 kg/mu; (4) the production level is below 350 kg/mu, the recommended dosage of formula fertilizer is 20-28 kg/mu, and the combination is from the beginning to the jointing stage. Irrigation and urea application 7-9 kg / mu.
3.2.2 One-time fertilization program recommended formula: 25-12-8 (N-P2O5-K2O) or similar formula.
Fertilization recommendations: (1) The production level is 350-450 kg/mu, the recommended dosage of formula fertilizer is 39-50 kg/mu, which is applied as a base fertilizer at one time; (2) The production level is 450-600 kg/mu, and the recommended dosage of formula fertilizer is 50- 67 kg/mu, as a base fertilizer for one-time application; (3) The production level is 600 kg/mu or more, the recommended dosage of formula fertilizer is 67-78 kg/mu, which is applied as a base fertilizer at one time; (4) The production level is below 350 kg/mu. The recommended dosage of formula fertilizer is 28-39 kg/mu, which is applied as a base fertilizer at one time.
4 Recommended formula for medium and low concentration formula fertilizer in winter wheat area of ​​the middle and lower reaches of the Yangtze River: 12-10-8 (N-P2O5-K2O) or similar formula.
Fertilization recommendations: (1) The production level is 300-400 kg/mu, and the recommended dosage of formula fertilizer is 34-45 kg/mu. From the start-up period to the jointing stage, combined with irrigation and urea, 9-12 kg/mu; (2) Yield level 400- 550 kg / mu, the recommended dosage of formula fertilizer is 45-62 kg / mu, from the start-up period to the jointing stage combined with irrigation and urea 12-17 kg / mu; (3) the production level of 550 kg / acre, the recommended dosage of formula fertilizer 62- 74 kg/mu, from the period of the body to the jointing stage, combined with irrigation and urea, 17-20 kg/mu; (4) the output level is less than 300 kg/mu, the recommended dosage of formula fertilizer is 23-34 kg/mu, and the combination is from the beginning to the jointing stage. Irrigation and application of urea 6-9 kg / mu.
4.2 High-concentration formula fertilizer program recommended formula: 18-15-12 (N-P2O5-K2O) or similar formula.
Fertilization recommendations: (1) The production level is 300-400 kg/mu, and the recommended dosage of formula fertilizer is 23-30 kg/mu. From the start-up period to the jointing stage, combined with irrigation and urea, 9-12 kg/mu; (2) Yield level 400- 550 kg / mu, the recommended dosage of formula fertilizer is 30-42 kg / mu, from the start-up period to the jointing stage combined with irrigation and urea 12-17 kg / mu; (3) the production level of 550 kg / mu or more, the recommended dosage of formula fertilizer 42- 49 kg/mu, from the period of the body to the jointing stage, combined with irrigation and urea, 17-20 kg/mu; (4) the output level is less than 300 kg/mu, the recommended dosage of formula fertilizer is 15-23 kg/mu, and the combination is from the beginning to the jointing stage. Irrigation and application of urea 6-9 kg / mu.
5 Southwest wheat area 5.1 low-concentration formula fertilizer program recommended formula: 12-10-7 (N-P2O5-K2O) or similar formula.
Fertilization recommendations: (1) the production level is 250-350 kg/mu, the recommended dosage of formula fertilizer is 25-35 kg/mu, and the re-greening period to the jointing stage is combined with irrigation to apply urea 7-9 kg/mu; (2) the production level is 350- 500 kg/mu, the recommended dosage of formula fertilizer is 35-50 kg/mu, and the urea is added to the jointing stage to apply urea 9-13 kg/mu; (3) the output level is more than 500 kg/mu, and the recommended dosage of formula fertilizer is 50- 60 kg/mu, from the greening period to the jointing stage, combined with irrigation and topdressing urea 13-16 kg/mu; (4) the production level is below 250 kg/mu, the recommended dosage of formula fertilizer is 15-25 kg/mu, and the combination of the greening period and the jointing stage Irrigation and application of urea 4-7 kg / mu.
5.2 High-concentration formula fertilizer program recommended formula: 19-15-11 (N-P2O5-K2O) or similar formula.
Fertilization recommendations: (1) The production level is 250-350 kg/mu, the recommended dosage of formula fertilizer is 17-24 kg/mu, and the greening period to the jointing stage is combined with irrigation to apply urea 6-9 kg/mu; (2) Yield level 350- 500 kg/mu, the recommended dosage of formula fertilizer is 24-34 kg/mu, and the urea is added to the jointing stage to apply urea 9-13 kg/mu; (3) the output level is more than 500 kg/mu, and the recommended dosage of formula fertilizer is 34- 40 kg/mu, from the greening period to the jointing stage, combined with irrigation and topdressing urea 13-15 kg/mu; (4) the production level is below 250 kg/mu, the recommended dosage of formula fertilizer is 10-17 kg/mu, and the combination of the greening period and the jointing stage Irrigation and application of urea 4-6 kg / mu.
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