Black locust artificial breeding technology
First, nursery technology
1. Seed-collecting, Seed-storing and seed storage The black-capped pods are harvested for 7.11 months. When the fruit turns from green to purple-black, it must be harvested in time and then registered and shipped to designated locations. After the seeds are collected, the seeds are taken with a gauze wrapped in water to elute the grains, and then washed with fine mash. Use dry or dry sun for drying. Avoid exposure. Net species use artificial net species method. After the seed is prepared, it is stored in a dry, ventilated place with a fiber bag.
2. Determination of seed quality. In addition to investigating whether the seed quality is excellent, the seed quality should also be tested for the clarity of the seed, its quality, germination rate, viability, fineness, water content, and weight. The main thing is to test the seed germination rate. The method uses the laboratory sample germination method to determine. Seed goodness judges the superiority of the seed according to the seed appearance and the internal anatomical condition.
3, reproduction
4, selection and preparation of land. Select land with flat terrain, convenient irrigation, soil hypertrophy, pH value below 8, and alkali salt content not exceeding 0.3%. Shifei 2000-3000kg/667 square meters, deep plowing 20-30cm in autumn, and pouring winter water. In spring, we plough shallow and make hoe 1.2m wide.
5. Breeding methods are mainly based on seed breeding. Before sowing, the stored seeds were soaked in 40C warm water for 24 hours to increase the germination rate, and the general germination rate was about 90%. Sowing period is from late March to mid-April. Drilling is conducted at a spacing of 30cm, and the depth of the ditch is 0.5-1cm. The seed is mixed with some fine sand and evenly sowed in the ditch, covered with fine sand, watered after lightly pressed to keep the soil moist, and the water is shallow every 1-2 days. Irrigation once, temperature 17-21, 5-7d emergence. Seeding rate 1-1.5kg/667 square meters, 40,000 seedlings/667 square meters. If there is no watering condition or water shortage, after sowing, cover fine sand and soil, and then cover with plastic mulch, cover the earth with 1.5-2cm of soil on top of the ground film. It is advisable to pass through the sun and observe it every day. When the land was selected, rainy weather was all removed. In this way, soil moisture can be effectively conserved, evaporation of moisture from soil and the drying up of soil can be avoided. In order to solve the problem of sowing deep and buds, sowing shallow and burning buds. This method of summarizing in the production of sports seedlings is very practical for seedlings of fine seed varieties in places where Taiwan and other water sources are insufficient.
Second, field management
1. Cultivated weeding: After seedling emergence, weeding of weeds should be carried out. Weeding should be done 4-6 times a year, and weeding should be used for weeding.
2, irrigation: According to the soil moisture conditions timely irrigation, generally 4-6 times within 1 year.
3. Saplings: When the seedling height is 3-5cm in June, the weak seedlings and the dense seedlings will grow. In the middle of July, Dingmiao will be planted. The distance between the plants will be 10-15cm, and the quality will stay weak and stay weak.
4, top dressing: In conjunction with irrigation in the middle and late June, topdressing available nitrogen fertilizer 1-2 times, in mid-late July, top dressing again.
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