On the 21st this year, the newspaper published an interview with the reporter on the article "Straw nutrient pod nursery technology is fresh." There are readers to call for proposals, when the current corn seedling stage, and hope to publish details of technical operations. Recently, Yang Qin, an assistant researcher at the Provincial Academy of Agricultural Sciences, described the key steps of this technology as follows:
Nursery seed selection
The choice of seedbed should be close to Datian, easy for transplanting, choose ventilation, sunny, flat terrain, convenient water source, and easy management. Prepare straw nutrition in accordance with the planned density. Normally, 667 square meters of corn seedlings in Daejeon will be used to prepare a seedbed of 7 to 12 square meters. Seedbed beds are underground, with built-in bed curtains to help cover the film and keep warm. The bottom of the seedbed needs to be leveled.
In the hilly areas of Sichuan, the varieties with good yields such as Chuandan 418, Chengdan 30, Zhongdan 808, and Nonghua 7 can be selected. In shallow hills or semi-mountainous areas, Zhenghong 311 and Sichuan Dan 14 should be selected for drought resistance and drought resistance. Seed drying before sowing 2 days to 3 days, with seed coating agent.
Nutrition soil preparation
With 30% to 40% of the decomposed organic slag, 60% to 70% of the fertile fine soil as the basic material, according to the ratio of 100:1 added to the sieved superphosphate, urea 0.1 kg, after mixing, Add clear manure water to the "hand into a group, touch the ground that" spare.
sowing
Straw pods nursery seedlings, first on the seedbeds covered with agricultural film, easy to transplanting when the rake, each worm into the nutrient soil to the middle can be, and then neatly placed into the seedbed.
Sow 1 to 2 seeds per plant when sowing. After sowing, cover the seed with fine soil. The fine soil should be substantially uniform, with a thickness of not less than 1 cm, and then be irrigated with water.
Seed management
Before sowing until emergence, moisturizing is the main method of keeping warm, generally not ventilated before emergence, as long as there is no soda on the membrane every day. After emergence, supplementary irrigation should be conducted according to the condition of the seedbed. 2 to 3 days before transplanting should not be watered again. The temperature in the film before the needle was controlled below 35 degrees Celsius; after the needle was out, the temperature inside the film was controlled below 25 degrees Celsius to prevent burning of the seedlings. After the leaves appeared, it was uncovered and ventilated when the temperature difference between the inside and outside of the membrane was small at about 9:00 a.m. in clear weather.
Daejeon preparation
The field preparation should be carried out at the latest when seedlings are planted. It is better to plow tillage or plow till one month before planting. Prior to transplanting, corn planting holes should be prepared according to planned planting specifications. The amount of base fertilizer should be combined with site preparation to apply basic fertilizer. In general, 2000-3000 kg of organic fertilizer applied in Mushi, 10 kg of urea, and 40 kg of superphosphate. Avoid fertilizer contact, so as not to burn seedlings.
Transplanting
Transplanting time began in the 1st leaf of maize seedlings. The transplanting of small seedlings was recommended. The seedlings transplanted basically had no seedlings and the survival rate was high. During transplanting, transplanting should be carried out according to the planned spacing of the plants. After the planting, the cover should be covered with fine soil to prevent the drought from drying up the straw and affect the growth of the roots. The use of wide and narrow row nest planting, generally compact seedlings planted 3500 ~ 4500 / acre, semi-compact seedlings planted 3000 ~ 3500 / acre.
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