Variety selection According to different cornices, variety characteristics and safe heading period, select the varieties with high quality, high yield, stable yield, strong tillering, and good stress tolerance and heavy or large panicle type suitable for local planting. The early-maturing late japonica rice varieties are mainly along the Yangtze River and the southern Jiangsu Province, with late-maturing japonica rice varieties. The early-maturing late japonica rice includes Nanzhao 44, Ningjing 3, Yangchuang 4038, Wuyunjing 23, Zhendao 11 and other varieties; the late-maturing middle japonica rice mainly uses Wuyunjing 24, Huaidao 13 and Huaihe rice. No. 9 and other varieties. The middle and late mature medium japonica rice varieties dominated the middle and middle mature crops of Suzhong and Lixia Rivers, and they were paired with middle-maturing japonica rice and early-maturing late japonica rice varieties. The medium-mature middle-japonica rice uses Lianjing 7, Xudao 3, Wuyunjing 21 and other varieties. Huaibei and Huaibei regions are dominated by middle-maturing japonica rice varieties, with late-maturing japonica rice varieties.
The standard seedlings of Zhuangjing are neat and tidy, with 30 to 35 days of age, 5.5 to 6.5 leaf ages, 13 to 18 cm seedling height, 0.35 to 0.45 cm thick stems, 4.5 to 6 green leaves per plant, and 12 to 18 white roots. , With 0.5 to 1 turns, 100 dry weight 7.5 grams, no pests.
20 days before sowing for seedling preparation, 30 kg per gram of urea and 45% BB fertilizer are applied per acre, and the soil is ploughed promptly after fertilization. The seedbed is required to have a width of 140 cm, a width of 25 cm, a ditch depth of 20 cm, and an inner and outer ditch matching to ensure smooth drainage. About 20 days before sowing, sunny days and 250 to 300 kilograms of nutrient soil per mu of farmland are reserved. The nutrient soil needs to be disinfected. The seeds are sunscreened, screened and then sterilized. For each 5 kg rice seed, 25% prochloraz EC 2 ml plus 4.2% dithiocyanato-methane EC 2 ml, or 16% imimethestine wettable powder 15 g, add water 9~10 kg soaking for 60~72 hours, direct sowing without germination; or directly after sowing with “dry nurse nanny†dressing. There are 55 or so 秧 434-hole plates per mu. According to Daida, it is 1:35 to have enough seedbeds.
Determine the sowing date according to 30~35 days to determine the sowing date to determine the sowing date. Huaibei area is generally on May 15-25, Suzhong area is generally on May 10-20, southern Jiangsu area is generally on May 5-15. .
Seeding procedure Before placing the trampoline, place enough water on the trampoline to horizontally attach the two rows of plates. The plates and plates are close to each other without leaving any gap. The bottom of the plate is closely connected with the bed surface. Fertilize the soil with fertile soil and spread it evenly into the pan. After spreading the soil, set the bed and evenly sow the seeds. Each hole falls 3 to 4 grains. Cover the wells with a nutrient soil that is unsatisfactory. Conditions can be poured with water pouring method, if you need to speed irrigation irrigation method. After the seedlings are drained, the mud shall be used to dredge around the sampan plate, then cover the mulch or non-woven fabric, cover the wheat straw, etc. to maintain the light transmittance of 10% to 15%. The film (non-woven fabric) does not need to be filled with water during the period of covering grass, and the water accumulation in the field is eliminated in time on rainy days.
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