Qingza 2 (formerly code 303) is a hybrid plant cultivated by three-line hybrids at the Qingcai Research and Development Center of Qinghai Academy of Agriculture and Forestry Sciences. In December 2000, the review was passed and in 2002, Xunhua County was introduced as a pilot plant. (I) Advantages 1. The oil content of spring rapeseed No. 2 was 45.2%, the erucic acid content in oil was 0.65%, and the glucosinolate content was 27.81 μmol/g. 2. The high-yielding effect of spring hybrid rapeseed No. 2 was significant, with effective branching site of 5.3cm, main inflorescence length of about 70cm, plant height of 176cm, pods dense, and the number of effective fruit pods per plant was about 387. A large area of ​​200-250 kg per mu, under high water and fertilizer conditions yields 250-280 kg per mu. 3. Qingza 2 has a total fertility period of 133 days. It is spring-like, early-maturing, drought-resistant, and cold-resistant. Suitable for planting in the area below 2800 meters above sea level in our county. (II) Cultivation techniques with high quality and high yield 1. The cultivation technology of Qingza 2 is similar to that of other rapeseeds. It is also necessary to establish isolation zones during production, and it is possible to adopt natural barrier isolation and isolation of different crops (such as wheat). If isolated with different crops, the isolation distance should be increased. 2. Select the species in the ecological area. 3. The determination of the sowing date must satisfy the requirements of rapeseed nature and avoid the interference of unfavorable factors. My county Sichuan River area is generally planted in the middle or late March, and dry mountain areas are broadcast in mid-April. 4. Where the mass per mu is more than 250kg, the number of plants per mu is between 1-30000. 5. The spring rape growth period is short, although the seedling stage in the application of a large number of organic fertilizer on the soil, but due to low temperature in early spring, limiting the activities of soil microorganisms, nutrient decomposition is slow, seedlings can not be timely nutrition, the emergence of early hunger Slow growth. Therefore, it is necessary to apply seed fertilizer to ensure quick-acting nutrients for seedlings and obtain strong seedlings. In general, 15kg of superphosphate and 5kg of urea are used per acre. Before sowing, they are mixed with appropriate organic fertilizers to make them into pellets, which are sown with the seeds. 6. The pests in spring seedling stage are mainly yellow striped hop and stem hawksbill. The control method is using 5% of phorate 1.5kg mixed seed sowing; if locust is available during the growth period, dichlorvos, dimethoate 600 to 1000 times liquid Conduct prevention and treatment. 7. High-yielding field rape generally turns about one-third of the pods in the lower part of the main sequence into yellow, and the upper pods in the branches turn into light green, and the grains turn red-brown, that is, the plants are harvested during the “yielding†of the yellow ripening stage. should.
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