For late rice, whether it is continuous cropping late rice or late cropping rice, fertilization techniques in Putian are significantly different from early and mid-season rice. Because of the relatively high temperatures and mud temperatures during the breeding season, the release of nutrients and fertilizers in the soil is relatively fast, and the age is relatively long, generally 30 to 40 days and up to 50 days.
According to the above-mentioned characteristics, the requirement for raising children is to require the seedlings to be thick and handsome, but must also avoid the excessive growth of the seedlings, the occurrence of leggy and jointing defects. Therefore, the late rice paddies should use slow and long-lasting organic fertilizer such as pond mud, pig manure, etc. as base fertilizer. At the same time, a small amount of phosphorus fertilizer was applied, and the amount of phosphorus fertilizer was earlier, and the middle rice was less. Generally, no or less chemical nitrogen fertilizer is used as a base fertilizer to control the growth of seedlings.
Nitrogen fertilizer for top dressing must be strictly applied to the seedling application, and no shortage of fertilizer in mid-seedlings will not be top-dressing. However, it is very important to get up from the fertilizer to the late rice seedlings. Generally, 2.5 kg of urea or 5 kg of ammonium sulfate is applied every two to three days before transplanting to facilitate the development of new roots after transplanting and accelerate the turning green of the seedlings.
Potassium application in late rice seedlings can not only enhance potassium nutrition, but also prevent and treat flax leaf spot, brown spot disease and other diseases of seedlings. It is appropriate to apply 8 kg of potassium chloride per hectare of late paddy field.
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