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How to Prevent and Control Sweet Potato Stem Nematode Disease? Detailed Technical Methods
Sweet potato stem nematode disease is a devastating disease in sweet potato production. It is highly destructive and spreads quickly. It can infect and cause damage during the seedbed stage, field stage, and storage stage, but it mainly infects the tubers. Affected sweet potatoes have brown, bluish skin with cracked patterns, and the tubers are light. Some tubers show no external abnormalities, but are hollow and pithy inside. This disease not only affects the quality of sweet potatoes, but also severely affects sweet potato yield.
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Detailed Explanation of Key Points for Virus-Free Sweet Potato Cultivation Techniques
Virus-free sweet potatoes differ from ordinary sweet potato varieties, and their cultivation techniques also differ. The cultivation techniques are introduced as follows: 1. Ridging and early planting. Virus-free sweet potatoes have strong drought tolerance and vigorous growth. After the wheat harvest, ridges should be made as early as possible to strive for early planting. 2. Formula fertilization. For dry and infertile land, apply 5000 kg of farmyard manure, 30-40 kg of ammonium bicarbonate, 15-20 kg of potassium sulfate, and 40-50 kg of superphosphate per mu; for medium to above-medium fertility fields, apply 3000-4000 kg of farmyard manure, 20-30 kg of ammonium bicarbonate, 20 kg of potassium sulfate, and 30 kg of superphosphate per mu. In addition to applying sufficient base fertilizer, it is also necessary to apply hole fertilizer, seedling-promoting fertilizer, tuber-promoting fertilizer, and later-stage foliar topdressing, etc.
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Cultivation Techniques for the Sweet Potato Variety Guangzishu No. 1
Guangzishu No. 1 (Guangshu 95-1 / Guangshu 88-70) is a new sweet potato variety bred by the Crop Research Institute of the Guangdong Academy of Agricultural Sciences, and it passed variety approval in Guangdong province in March 2005. 1. Characteristics: The full growing period of summer-autumn sweet potato is 110-130 days. The tip leaves are purple at the margins, the leaf shape is shallowly compound, the veins are purple
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Sweet Potato Protected Cultivation Experience and Key Technical Points
Using large and medium shed facilities for early-maturing sweet potato cultivation can not only improve the utilization rate of limited land resources and light-heat resources and increase the yield and benefits of sweet potato production, but also enable double-season sweet potato cultivation in the Beijing suburbs, promoting reform of the cropping system
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Main cultivation technical points for purple sweet potato planting
1. Land selection: Most purple sweet potatoes belong to mid-to-late maturing varieties, with tuber rapid expansion and yield formation occurring relatively late. The plot to be planted not only requires relatively high soil fertility, but the soil texture should be light loam or sandy loam, and the land levelness and drainage and irrigation conditions should be good. Purple sweet potato has
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Key Field Management Techniques for Growing Vegetable Sweet Potato
1. Checking seedlings and filling gaps: 5-7 days after planting, check the survival of the sweet potato vines and promptly replant strong seedlings in spots where plants are missing. 2. Topdressing: For spring sweet potatoes, 30-40 days after planting, after the vines spread and before the rows close; for summer sweet potatoes, 20-25 days after planting, open holes below the side of the ridge and apply topdressing, using 30 kg per mu of compound fertilizer (N:P:K=10:7:8); combine topdressing with loosening the soil between ridges and hoeing weeds.
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Key Technical Points for Off-Season Cultivation of Sweet Potato
In order to improve the economic benefits of growing sweet potatoes, in addition to post-harvest deep processing, sweet potatoes can also be brought to market earlier through off-season cultivation. Two off-season cultivation techniques are introduced here. 1. Cultivation technique for sweet potatoes marketed in May-June: Use the method of storing water between ridges inside a greenhouse plus a small arch shed to improve the heat preservation effect. Planting can be done from December to January of the following year. Using virus-free shoot-tip seedlings cultivated in a small arch shed, the yield for market in May is 1300 kg per 667 sq m. The income is much higher than that of conventional planting.
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Detailed Explanation of Key Techniques for High-Yield Cultivation of Hybrid Rice
1. Seedling Raising (Dry Seedling Raising Technique) 1. Seed treatment and germination acceleration: Before soaking the seeds, sun-dry them for 1-2 days, rinse with clean water, remove the empty and shriveled grains, and put the seeds in a nylon mesh bag. Then soak the seeds in a 500-fold dilution of 50% carbendazim wettable powder for 24 hours, take the seeds out, wash them clean with clean water
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Key Points of Fertilizer and Water Management Techniques for High-Yield Rice Cultivation
In high-yield rice cultivation, the level of yield is determined by fertilizer and water application as the core; fertilizer and water application should be decided according to the fertilizer requirements of the variety, the level of soil fertility, the planting time, etc. Generally, 100 kg of paddy rice requires 2 kg of pure N, 1.2 kg of pure P, and 1.5 kg of pure K. The fertilizer and water application measures are specifically proposed as follows:
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Key Cultivation and Management Techniques for Machine Transplanted Rice
1. Field Ploughing and Preparation Requirements 1) Field ploughing and preparation: rotary tillage depth of 10-15 cm; plough tillage depth of 15-20 cm. 2) Field levelling: the surface height difference within each field block shall not exceed 3 cm. The field surface shall be basically free of weeds, debris, shallow stubble and other residues.
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