4 precision fertilization technology
4.1 determine the amount of fertilizer
The combined growth period is long, and it is resistant to fertilizer and lodging, requiring a large amount of fertilizer, especially in the middle and late stages. The application of organic fertilizer, application of potash fertilizer, and application of nitrogen, phosphorus and potassium should be emphasized. The combination of high-yield cultivation conditions under the yield of 9750kg/hm2, pure nitrogen application 195 ~ 210kg/hm2, phosphorus pentoxide 75 ~ 90kg/hm2, potassium chloride 150 ~ 180kg/hm2 is appropriate.
4.2 Fertilization method
In order to improve the utilization rate of nitrogen fertilizer, the basic fertilizer was changed to “dry planting before the ploughing after ploughing†and the fertilizer was mixed in the soil to reduce fertilizer loss. Change the topdressing fertilizer layer to wet application, that is, top dressing when the surface wet, dissolved into the soil after re-irrigation, reduce fertilizer loss and denitrification loss due to denitrification.
4.3 base fertilizer top dressing ratio
In view of the low temperature and early rain conditions in the Weibei region, and the fertility characteristics of super rice in the later period, the basal fertilizer should not be too heavy to prevent loss and deferment. Emphasizes the application of spike fertilizer. Therefore, the ratio of base fertilizer to tiller fertilizer and panicle fertilizer in nitrogen fertilizer is 6:3:1. Potassium fertilizer is applied in panicle fertilizer and grain fertilizer (zinc fertilizer, etc.) is applied as appropriate.
4.4 Top dressing period
The tillering manure was applied twice within 7 to 15 days after transplanting to promote the early birth of the crop. Pan-fertilizer (nitrogen, potassium) is mainly protected in Shebanga (fermentation of young panicles with 5 to 6 stages of application), and granular fertilizer is applied as appropriate at the time of panicle initiation.
5Scientific water pipes, repeatedly lighted
For this combination, the root system is developed, the growth potential is strong, and there are two grouting characteristics in the later stage. To promote early-onset early-phase birth, the control of late delivery is ineffective for delivery, and the root vitality is ensured in the later period. In the water pipe, “enhance gas, root support, and vitality should be "As the center, the specific method is to return to the green period to keep the shallow water returning green. The wet weed irrigation promotes tillering in the tillering stage. When the number of seedlings reaches 80% of the scheduled number of panicles, it begins to grow in the field and is used for multiple light exposures. The paddy fields with overgrown nutrition may be appropriately weighted. In the sun, the maximum number of seedlings was controlled at about 3.75 million/hm2. Through multiple light exposures, control the ineffective delivery and promote root growth and deep penetration. After the panicle has been differentiated, it maintains shallow water till the heading and flowering stage. At the ripening stage of grain filling, intermittent irrigation is adopted, alternating between dry and wet. The flowering stage is mainly wet, and the latter stage is mainly dry to ensure root vigor, prevent premature aging, and increase seed setting rate and filling degree.
6 Strengthen pest control to ensure high and stable production
Diseases and pests are mainly prevention, comprehensive agricultural control, and timely prevention and control of necessary chemical agents (low toxicity, low residue). Special attention should be paid to diseases such as dwarfism, sheath blight, panicle blast, rice planthopper, and rice leaffolder. The use of imidacloprid and Yefensan in Putian period focused on the control of the occurrence of Dwarf aphids in the black-tailed leafhopper, and the use of Aiyou or Jinggangmycin, addition of rice or tricyclazole in the booting, heading, and heading stages. Chemicals prevent Rhizoctonia solani and rice blast, use BT preparations, or chemicals such as chlorpheniramine, chlorpheniramine, or fleas, to control pests such as rice leaf roller and rice planthoppers, and minimize the loss of pests and diseases to achieve high and stable yields.
7 Harvest
Generally 50 to 55 days after the panicle start, all the grains in the base of the panicle turn yellow and then harvested.