Reference model of fertilization for high-yield rice

The soil testing and formula fertilization model for rice yield 450~550kg per mu is as follows:

(1) the total amount and ratio of fertilization

The ratio of nitrogen, phosphorus and potassium should be about 1 10~13kg 0.5 7kg, and the total amount is about nitrogen 0.5, phosphorus pentoxide 5 ~ 7kg, potassium oxide 8~12kg.

(2) fertilization scheme

1 base fertilizer:

(1) Organic fertilizer:

Generally, early rice applies fresh green manure 1000~2000kg or barnyard manure 500~1000kg or commercial organic manure 60kg / mu; late rice can use early rice straw to return to the field as organic fertilizer (the amount of early rice straw is 1x2pm / mu) or barnyard manure 500~1000kg or commercial organic manure 80kg 100kg per mu; one-season rice applies barnyard manure 500~1000kg or commercial organic fertilizer 80~100kg per mu.

(2) Chemical fertilizer: urea 7~9kg, calcium magnesium phosphate fertilizer 35~45kg, potassium chloride 4~6kg, zinc sulfate 1kg.

2 topdressing

(1) tillering stage: urea 5~7kg, potassium chloride 4~6kg

(2) booting stage: urea 6~8kg, potassium chloride 5~7kg

(3) heading date: potassium dihydrogen phosphate 0.2kg plus urea 0.5kg was sprayed on water 50kg to prevent premature senescence.