The level of machine transplanting and cultivation techniques can determine the level of rice production in a season. The research team headed by Dr. Wu Wenge, the director of the rice cultivation department of the Provincial Academy of Agricultural Sciences, has devoted himself to the study of the techniques of balanced cultivation of middle-medium hybrid rice in recent years, and has targetedly proposed the “strength, early-onset, controlled-intensity, and strong-backward†techniques. Ideas.
Thin broadcast
According to Dr. Wu Wenge, the key point of hybrid middle-season rice transplanter balance cultivation techniques is rare-seeding and strong seedlings. The ratio of drought-bearing to seedlings is 1:80-90 for seedlings and 1:70-80 for seedlings. . Prepare 1-1.2 kilograms of hybrid rice seeds per acre of Daejeon, and collect 18-20 oyster disks. The childbearing can be used to standardize parenting in a standardized breeding workshop.
After the seedbed is ready for 1-2 days, it is placed on the seedbed. Before placing the trays, 65% of the enemy can be mixed with water to make a 1:1000-1500 liquid spray bed to sterilize bed soil. After placing the plate, evenly spread 2 cm thick pre-prepared nutrient soil, and use a wooden strip to level it and sow in the tray. The hybrid mid-season rice was sown at 3,000 (65-70 g) per plate.
After the sowing is finished, ditch or spray water, moisten the soil after the disc is covered with a layer of fine soil in a timely manner, the thickness is not suitable for dew (about 0.5 cm). After the seeds are covered, the prepared enemy liquid is sprayed again onto the trays to disinfect the tray soil and cover soil.
Fine field
The level and quality of field tillage directly affect the quality of machine transplanting. Therefore, according to factors such as soil fertility, farmers should use organic fertilizer combined with quick-acting fertilizers to apply basic fertilizer and then intensive cultivation. After the cultivation, the difference between the height and the height of the plot is no more than 3 cm. After Daejeon's death, he must continue to sink and the actual time will depend on the soil and the season. Usually the early rice field is 2-3 days thick and the late rice field is 1-2 days.
According to the characteristics of the varieties and the local climate conditions, to determine the planting time. The winter free field rice is sown in late April and planted in mid-May. The rapeseed japonica rice is sown on May 10th and planted at the end of May. The wheat japonica rice is sown on May 20th and planted on June 10th-15th.
Balanced fertilization
In order to improve the unbalanced status of weak, medium and late declines in machine-planting rice before fertility, basal fertilizers should be re-applied for the application of nitrogen fertilizer. Early application of live tree fertilizer should be carried out. Balanced application of nitrogen fertilizer should be used to promote manure fertilizer. . The test showed that the total application of pure nitrogen per acre of paddy field should be controlled at 14-17 kilograms, including 40-50% of base fertilizer, 5-7 days after planting, and two applications of tiller fertilizer within the critical 2.5 years of effective tillering. The amount of its use accounted for 10-20% of the total amount of fertilizer, ear fertilizer accounted for 30-40%; in the panicle fertilizer, jointing strong stalked fertilizer accounted for 50%, strong flower strong seed fertilizer accounted for 50%.
After planting, keep a certain amount of moist and standing seedlings for 3-4 days before living, and expose fields for 1-2 days after living. Maintaining a 3 cm water layer to promote wet conditions promotes tillering. Avoid long-term water retention, should be appropriate to release water, dry field, night irrigation night row, to adjust fertilizer with water, water to gas, to promote the root cause of gas, to promote early delivery of childbirth.
Heading and flowering period meets the high temperature and requires deep water (5-10 cm) to adjust the temperature. In the later period, dry, wet, wet and dry and wet, alternating with dryness; prevent dehydration prematurely, last run on horses for 15 to 10 days before harvesting, and cut off hardfield for 5-7 days before harvest.
In the past three years, the technology has consistently achieved an average yield of 750 kg or more per hectare of core demonstration farms, and an average yield of 700 kg per 1,000 mu of demonstration farms. In 2013, the 300-mu core demonstration field in Qiaowan community of Tianchang City was field-tested by experts and the average yield was 777.8 kilograms, creating a high yield record for interplanting cultivation of medium japonica rice in the Jianghuai region.
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