The spring mulch dwarf bean marketed early, bright green color, high nutritional value, good taste, welcomed by consumers, but dwarf beans for self-sealing crops, low yield, therefore, how to improve the continuous ability of dwarf beans, extended Harvest time is a key issue for raising dwarf bean production. In the past few years, the author has worked out techniques for mulching and pruning to promote high yields. She has achieved early market, high yield, and excellent quality, and achieved good results of more than 2,000 yuan per 667 square meters. The cultivation points are as follows. First, choose the fine varieties of early spring cultivation of kidney beans should choose early maturation, high yield, harvesting period, cold resistance, strong, strong regeneration ability of the species. Such as "U.S. suppliers" and "French cowpea." 2. Soil fertility was chosen for fertilization in soil preparation and no sandy soil land was planted in kidney bean within three years. Half a month before sowing, deep-turning, apply 2,000m of organic fertilizer fully decomposed per 667m2, superphosphate 20kg, ammonium sulfate 15kg, potassium chloride 15kg, fine soil preparation, soil and fertilizer mixing, soil preparation and leveling, made of high 12-13cm , 90cm wide high sorghum. Third, seed treatment and sowing 1. Seed processing seed before sowing seeds selection, drying 1-2 days, with Rhizobium seed dressing, or soaking with 0.5% copper sulfate 10min, in order to promote the growth and development of Rhizobium. 2. Seeding method using live broadcast, sowing 3 lines per plant, plant spacing 20cm30cm. 4-5 seeds per hole, sowing depth 3-4cm, consistent depth of cover, surface leveling, a shallow ditch between the two lines, after laying the film, the film on both sides of the two sides with soil compaction. If the membrane is damaged, seal it with soil to prevent ventilation, warming and protecting the seedlings. 3. The sowing time must be sown when the 10cm ground temperature is stable above 10°C. The suitable sowing date in Chengde area is in mid-April. Fourth, breaking the membrane seedlings, Dingmiao Dingmiao when the bean sprouts unearthed after the timely rupture of membranes to prevent high temperature hot seedlings. The method is to use a knife along the direction of the seedling slightly biased, the film will be cut open 3 ~ 5cm crack, exposed beans, not too large, do not hurt the cotyledons. After the release of the seedlings, the soil is used to seal the membrane mouth, and the time goes to weak seedlings, disease and insect seedlings, and in case of lack of seedlings, timely replanting shall be carried out. Fifth, to strengthen water and fertilizer management, prevent premature planting Dingmiao, you can pour a small amount of water, and with the water flushing thin manure, in the first inflorescence flowering period generally do not water, when the soybean meal began to hypertrophy, it is timely to provide adequate fertilizer . After each harvest, timely application of ammonium bicarbonate or large manure can be applied at a depth of 7 cm from the plant. In the late stage of growth, in order to prevent premature senescence, it is necessary to supplement fertilizer and water, and foliar spray 0.2%-0.3% urea and potassium dihydrogen phosphate. Sixth, timely harvesting of dwarf beans is easy to age, generally about 10cm in length. At this time, the harvest is tender, smooth, and has a good taste, but it also prevents falling. If it is harvested late, the cellulose will increase, the quality will decline, and the commercial nature will be poor, which will affect the economic benefits. Seven, pruning regeneration, promote production and harvest after a trip, dwarf bean roots intact, no aging. At this time, use scissors to remove 4 to 5 cm from the stem and cut off the above portion. After pruning, we must strengthen management, promote early-onset new leaves, pour water on sunny days, and apply diammonium phosphate with water, every 667m 2 10kg. After the occurrence of new leaves, apply 0.2% potassium dihydrogen phosphate 2 times. The yield after cutting one branch is similar to that of the first crop, which greatly increases the total output. If the root system grows well and the market conditions are good, the second pruning can be done, but it is necessary to pay attention to strengthening the management and make it grow well. VIII. Pest Control The occurrence of pests and diseases of dwarf bean in the early spring is relatively light, but it occurs occasionally. Such as: wilt, anthrax, rust, gray mold and so on. Fusarium wilt, controlled by 50% carbendazim WP 500 times; anthrax, controlled by 80% anthraquinone WP WP 800 times; rust, by 70% mancozeb wettable powder 1000 times by 15 % triadimefon WP 2000 times liquid control; gray mold, with 50% acetaminophen wettable powder 1000 times plus 90% phosporium aluminum wettable powder 800 times liquid control.
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