Cold water whiteness refers to the type of white water required for cold water irrigation in reservoirs. Due to the fact that the season of cold water and white water comes at a time when vegetables are off-season, the prices are high and the benefits are good. Therefore, the rapid development has led to the development of 1050 mu of land near the Nanshan Reservoir in the city, including Changle Yiqian Village, Yujia Village and Changleyi Village.
1. Select the farmland where the reservoir is cold water-irrigated and concentrate on contiguous planting. The water storage capacity of the reservoir is required to be more than 20 million cubic meters, the water source is sufficient, and the cooling effect is good.
2. Planting varieties are mainly planted in August in Yiwu. The new variety 8820, 8820 can also be used as a new variety. In 2001, it was planted at Changle Village. The performance was good. The variety was of high purity and excellent meat quality. The pregnancies rate was as high as 91.6%, and the clams yielded as much as 1100 kg per mu. Variety increase 100 kg, an increase of 10%. 8820 is suitable for cold-water planting. The planting density is 1500 bushes/mu, and the row spacing is 0.4 meters and 0.5 meters. Planting time in late March.
3, fertilization cold water white due to the short growth period, should be re-base fertilizer, early application of top dressing, the amount of fertilizer to basal, top half of the fertilizer is good. The basal fertilizer requires 3,000 kg of bar fertilizer per acre, 50 kg of superphosphate, and 25 kg of ammonium bicarbonate. Fertilizer planted 7 to 10 days after the application of fertilizer, per acre urea 10 15 kg plus butyl 80-100 g mixed application. After seeing the growth of white plants, applying fertilizer once every 25 days, applying 10-20 kg of urea per mu, and stopping the fertilization on July 20th. If the topdressing is applied improperly, or if the available nitrogen fertilizer is applied too much, it may easily cause overgrowth, increase the number of tillers, delay pregnancy, and affect the cold water irrigation effect. Therefore, cold water soaking is generally not applied to pregnant manure, which is different from other types of gills.
4, irrigation waterlogging early shallow irrigation, in order to promote the growth of tillers, late parturition began, especially in the progesterone phase to deepen the water layer, the depth of field water to maintain 15-20cm, generally adopt the string flow irrigation method, namely continuous string irrigation " "River horse water", or regularly intermittent irrigation.
5, Disease prevention and control pests cold water salamander growth period disease mainly white rust and white peony spot disease, both at the beginning of the disease began to spray control, white rust can be used 20% triadimefon 800 1000 1000 times, spray 1 2 2 times, in the middle Interval 7-10 days. White spot can be used 20% tricyclazole powder 100 grams per mu 37.5 kg of water spray 1? 2 times, spaced 7-10 days. The main pests are big larvae, clams, long-green locusts, whitefly, and black-tailed leafhoppers. The control of cockroaches can be used during the larval incubator period, with 5% frenquent suspension 50 ml/mu or 55% special. Killing powder (biological agent) 50 g/mu water 37.5 kg spray. Control leafhoppers, planthopper pests in the nymph incubation period with 25% buprofezin WP 25 g/mu or 10% imidacloprid WP 20 g/mu water 37.5 kg spray.
Fire Extinguisher,Automatic Dcp Fire Extinguisher,Co2 Type Fire Extinguisher,Water Mist Extinguisher
NINGBO TOMAN IMP. & EXP. CO., LTD , https://www.tdotmfiresolution.com