Scientific fertilization is very important to rice’s high quality and output, so it must be noticed that we must pay attention to the breediness, soil fertility and climate and cultivated situation and so on when fertilizing. As we know, early season rice need little fertilizer and it must fertilize early and intensively. Middle-season rice and late rice need large quantity of fertilizer and it needs to increase the top application times and proportion. At last, rice fertilization must be reasonable according to the different fertility of soil, so that we can improve the fertilizer effects and decrease the cost.
High fertility of soil, which refers that target yield is 650kgs/667㎡ or above, 1000-1200kgs organic fertilizer for every 667㎡ as the base fertilizer. The ingredient of fertilizer is: for every 667㎡ of area, urea 11-13kgs, Ca 15-20kgs, potassium sulfate 8kgs. Ternary fertilizer (14:6:5) is recommended, that is 35-40kgs/667㎡.
Middle fertility of soil, which refers that target yield is 600kgs/667㎡, 1200-1500kgs organic fertilizer for every 667㎡ as the base fertilizer. The ingredient of fertilizer is: for every 667㎡ of area, urea 13-15kgs, Ca 20-25kgs, potassium sulfate 8kgs. Ternary fertilizer (14:6:5) is recommended, that is 40-50kgs/667㎡.
Low fertility of soil, which refers that target yield is 550kgs/667㎡, 1500-2000kgs organic fertilizer for every 667㎡ as the base fertilizer. The ingredient of fertilizer is: for every 667㎡ of area, urea 15-17kgs, Ca 25-30kgs, potassium sulfate 8kgs. Ternary fertilizer (14:6:5) is recommended, that is 50-55kgs/667㎡.
The ingredient for rice high yield
To use P fertilizer and 80-90% K fertilizer as the middle fertilizer, the rest of N fertilizer to be tillering or spike fertilizer, K fertilizer to be used in the catagen period; For some zinc deficiency area, it can fertilize 1 kg zinc sulfate for every 667㎡ and spray 0.1-0.2% zinc sulfate solution for 2-3 times every 667㎡, every 7-10 days.
Mechanization transplanting for rice is very common now, and the fertilizing method is a little different from the general rice fertilization, as follows:
Fertilizing volume for the whole growth period: The main fertilizer is farmyard manure andorganic fertilizer, and matched with NPK fertilizer, which is the best. Generally, fertilizing 30-38kgs/667㎡, Ca 25-30kgs/667㎡, potassium sulfate 5-8kgs, zinc sulfate 2kgs, Ca fertilizer as the base fertilizer, potassium sulfate fertilized for twice, 70% of N fertilizer is used in the very beginning stage, and the rest is used as spike fertilizer.
Spike fertilizer: the length of stem young ear is 0.5cm, 5kgs urea, 4kgs potassium sulfate.foliage top-dressing: Fertilizing 250g monopotassium phosphate+ water in full panicle period.
