The use of rice variety diversity to control rice blast disease technology, the operation method is simple, has obvious effect of prevention and increase production, and soon accepted by the majority of farmers, and received the attention of government departments. Since 1998, more than 14 million mu have been modeled and promoted in 202 counties in 33 cities (prefectures) in Yunnan, Sichuan, Hunan, Jiangxi, and Guizhou, effectively controlling the epidemic of rice blast. The technical specifications of its demonstration and promotion are: Variety selection According to the genetic background of rice varieties, agronomic traits, economic traits, local cultivation conditions and planting habits of farmers, the selection of varieties. The matching technical parameters of resistance genetic background among cultivars are less than 75% similarity; the matching principle of agronomic traits is the combination of dwarf cultivars and high culm cultivars, and the high culm cultivars are more than 30 cm higher than dwarf cultivars. Basically consistent, before and after no more than 10 days. The matching principle of economic traits is the combination of high-product varieties and high-quality varieties to meet the farmers' needs for high yields and high quality, fully embody the principle of complementary economic benefits, and increase the enthusiasm of farmers for diversified planting. All localities need to mix and match varieties according to the local fertilizer, soil fertility, altitude, farmer's planting habits and preferences. At present, there are mainly two types of combinations of cultivars. One is high-yield dwarf hybrid rice as the main cultivar, the other is the high-yielding dwarf japonica rice cultivar, and the other is the high-yielding dwarf japonica rice cultivar. Varieties, with high-quality stalk local traditional varieties as intercropping varieties. Sowing date adjustment In order to make the maturity of different varieties consistent and conducive to field harvesting, adjust the sowing date according to the inbreeding period of the main cultivar and interracial cultivar, and implement the subsection breeding. According to the length of the growth period of the variety, the sowing time is determined, the early-maturing varieties are sowed, and the late-maturing varieties are sown early, so that different varieties in the same field can be simultaneously matured and harvested in the same period. In general, high-quality, high-stalk traditional varieties such as japonica rice, fragrant rice, purple rice, and soft rice were planted about 10 days earlier than the modern high-yielding dwarf hybrid rice varieties, and they were simultaneously transplanted and simultaneously heated. If the matching main and cultivars are basically the same, they can be sown at the same time. When seedlings are planted, dilute sowing and arching-type membranes are used to raise temperature and raise larvae to raise maggots and improve seedling quality. The cultivation and management of rice seedlings was manually transplanted from the seedbed to the field in April to May. The traditional rice transplanting method was a double row, narrow and narrow strip planting method. That is, every two rows of seedlings were a group, the row spacing was 15 cm, and the spacing was 15 cm. The distance from the group is 30 cm. The way to optimize the planting of rice varieties is based on traditional cultivation. Every 4 to 6 rows of seedlings (group 2 to group 3) are added with a row of conventional high-quality rice. Dwarf and high-yield varieties (hybrid rice) were planted in single plants, with a 15 cm spacing, and high-quality, high-stalked, traditional varieties were planted in groups of 4 to 5 seedlings with a cluster spacing of 30 cm. When transplanting, different varieties can be transplanted at the same time, or they can be planted one to three days after the main cultivar is transplanted. Fertilizer management in the field was carried out according to conventional high-yield measures. The pests were carefully monitored and the leaves were not used.
Diclofenac Sodium Suppository,Indomethacin Suppository,Tinidazole Suppository
Medicine,Health Food Co., Ltd. , http://www.cn-medicines.com