2014 Academy of sweet potato purple potato seedlings seedlings wholesale

It can start planting seedlings in mid-April is the proper implantation phase, when warmer temperatures in early spring perennial basically stable, Zaiyang appropriate period after the end of the frost 10 cm ground temperature reaches above 15 ℃: timely early plug, close planting; timely early planting seedlings, last year in early winter or early plowing when drying white, planted again when the entire plot of the ridge. Plot with a width of 50cm, in April, the mid accordance seedbed transplanting seedlings emergence speed gradually cut using wire flat plug ways to increase the number of potato seedlings buried section to increase tuber number. 3500-4500 plants per acre plug, spacing about 33cm. Transplanting time should not exceed April 20, otherwise the harvest was delayed, it will affect the continuous cropping late rice planting season. Timely early planting is the key to increase the sweet potato, under appropriate conditions, sowing songs earlier, the longer growing season, early tuber, tuber and more root enlargement long time, high yield, good quality; sowing songs too late, growth shortened, less sweet and small, low yields, poor quality, Zaiyang proper time is after the end of the frost 10 cm ground temperature reaches above 15 ℃, (mid-April) Mulching may be appropriate to advance, you can start sowing songs, in order to improve Zaiyang quality management to ensure that seedlings Wang, sowing songs to eliminate the "old hard Miao" sick and weak seedlings, planting seedlings selection, the best size grading seedlings when planting, planting, respectively, so that balanced growth, to combat sweet black class disease, can be 50% of the thiophanate-methyl 1000 times dip seedling base 2-3 inch, 10 minutes. Sweet potatoes should be planted in shallow fight on the basis of ensuring the survival, planting depth is generally 5-6 cm is appropriate to require tight mound, the same depth, the blade out of the ground, non-stick mud watering when planting, seedlings should be straight outcrop , seeding should not be exposed for too long, to prevent the wind dumped and seedling survival. Field management 1. Rooted Huanmiao stage management, rooted Huanmiao stage from transplanting new roots to grow roots begin to form, which lasted a month or so. After setting transplanting sweet potato seedlings to fill the gaps with timely investigation to ensure that all seedlings, sowing songs, such as the case of drought, the water should be poured Huanmiao to Bixente root survival. Usually after planting, to be watered once, after a cultivator to loosen the soil, raised temperature every 10-15 days, eliminate weeds, spraying timely new lipid membranes promote the rapid growth of beneficial plant root formation. 2. Mycobacterium tuber stage management, 30-40 days after planting with increasing temperature, leaf growth accelerated, root enlargement continues to form water and fertilizer management should be strengthened, with water in case of drought can catch 5-8 kg urea mu, Row crop cultivators after pouring to early soil moisture. 3. Sheng long roots stem swelling stage management, the late half of July to late August this enlargement of stem Sheng long root, leaf area index maximum, usually in this period, in order to promote the control of controlled there pro. This period coincided with the rainy season, temperatures are high, plants grow fast, in order to prevent excessive growth, available 50PPM the MET was added to fruit Zhuang City Spirit jet printing even in the field, covered with foliage rather than liquid flow better, can promote fruit development make sweet potato quality and high yield. During this period, the rapid expansion of the underground tuber, in case drought, to be watered, but the water is not too large, in order to promote tuber enlargement, can be mu Expansin bag (12) grams of 15 kg watered every other 7-10 days spray, and even spray twice. 4. Decline stems root enlargement stage management, after late August, sweet potato growth of late, stems from the slow growth until standstill; nutrient transport to the roots, the growth center from the ground to the ground, to protect the leaf to maintain the normal physiological function of management to promote the rapid expansion of roots. Management measures to ensure soil moisture, 60-70% field capacity, such as weather drought, no rain, soil drought, premature leaf form will affect carbohydrate, accumulation, resulting in cuts, and therefore little time pouring water, but not before the plane watering sweet potato harvest within 20 days, in case of floods in autumn, to timely drainage, to prevent a hard heart and rot before and after Chushu sweet potato leaves to get back into seedling stage. In order to prevent premature aging, prolong and enhance photosynthesis in the leaves, tubers hypertrophy promote, conduct Yemianpenfei, mu watered 30-40 kg of potassium dihydrogen phosphate catty new lipid membrane 800 times jet printing, each a total of 15 days spray interval spray twice, such as with the use of swelling Su better. 5. Topping. Virus-free sweet potato Man Long generally 1.5-3.5 meters long. When the sweet potato stem length to 50 cm, the election sunny weather in the morning put off the terminal bud; branches grow to 35 cm when buds continue to be removed. This method can inhibit the vine leggy avoid nutrient consumption, promote root block enlargement, can yield 20% to 30%. 6. Crack filling fat. Sweet potato tuber into the expansion period, topsoil cracks will appear. In this case, manure per acre with water 750 to 1000 kg, 500 g of potassium dihydrogen phosphate (also available superphosphate 5 kg, 50 kg ash were soaked in water filtration), mixing in manure in the morning or in the evening along the crack filling Shi, filling cracks with soil after irrigation, while spray to fruit Zhuang Ling Di anti deformed fruit, cracking, can yield 20% to 30%. Timely harvest of sweet potato tuber is asexual vegetative, there is no obvious standard and harvesting mature, but sooner or later the harvest of sweet potato yield, seed, storage, processing, use, crop rotation are closely related, premature harvesting would reduce productivity, Harvest over the party by cold damage effects, sweet potato harvest appropriate period, generally in the temperature dropped to 15 ℃, began to collect the plane, the temperature above 10 ℃ or ground temperature above 12 ℃ that is, before the dry frost closing plane is completed, usually in dew before closing plane is completed.