Peiza 268 was jointly used by the Zhaoqing City Agricultural Institute and the Guangdong Crop Heterosis Utilization Station to use the photo-thermo-sensitive genic male sterile line Pei'ai 64s as the female parent, and the new restorer line r268 bred with the Zhaoqing City Agricultural Institute was used as the parental matching group. A new late-maturing combination of early indica hybrid rice developed. In February 2003, it passed the certification of the crop varieties of Guangdong Province. First, the characteristics of the characteristics of 1? The main agronomic traits: the whole growth period of early for about 125 days, 110 days for late production, than Peizaza 7 early maturity of 1 to 2 days. The plant type is compact, the flag leaf is straight, and the tiller is strong. Early seedling stage has strong cold resistance, rapid early growth, good heat resistance in mature period, green stem wax stalk does not prematurely decline, and late-ripening mature period has strong cold resistance and good cooked color. The plant height is about 105 cm; the panicles are large and numerous, the number of grains per panicle is 138, the fertility rate is about 83.6%, and the grain weight is 22 grams. 2. Performance: In 2001 and 2002, it was built in the provinces and districts. The yield per mu was 437.0 kg and 417.5 kg respectively, which was 1.13% and 0.81% higher than that of the control. The Zhaoqing City Agricultural Science Institute organized early- and late-production trials in the city in 2002. The average yield per mu was 498.3 kg and 425.2 kg respectively, which was 5.40% and 7.30% higher than that of the control variety Peizaza. 3? Rice Quality: The appearance of rice quality is identified as a late-stage, rice grain is slender, the appearance is a silk seedling type, the rice is soft and hard, and the rice taste is good. 4 disease resistance: Resistance to rice blast, the whole group resistance ratio of 88.8%, b, c group resistance ratio were 76.1% and 93.4%; in the sense of bacterial blight. Appropriate for late planting in Guangdong Province and outside of northern Guangdong Province. Second, cultivation technology points 1? Reasonable scheduling sowing period: Peiza 268 in the early-cultivation genus in late-maturing combination, late-cultivation is a medium-maturing combination. Planting areas should be arranged in accordance with the actual situation in the local sowing, transplanting period, early and middle of the appropriate early sowing and late planting appropriate delay in sowing to extend the growth period and increase production. 2) Cultivate the strong and strong: Peiza 268 is a combination of large panicle and panicle hybrid rice, and sowing seedlings to sow seedlings is the key to seize high yield. The seeding rate depends on the sowing method. The amount of seedlings planted by big rakes is 10.5 to 12.5 kilograms per mu, and the seeding volume of medlars cultivated by small and medium mulberries is 13 to 15 kilograms per mu, and the seed amount per hectare cultivated for seedling cultivation is 1 ~ 1.25 kg, the early rice age of 27 to 30 days or so, the late age of 17 to 19 days. Before sowing, it is sterilized with strong chlorine soaking to reduce the disease at the seedling stage and promote the emergence of seedlings. 3. Field cultivation and management: Transplanting should take into account the characteristics of the spikes of this variety, and strictly control the density of planting and the number of seedlings. Generally, 20000 families and 2 to 3 seedlings are planted per acre. Seedling cultivation is not less than 1.8 million, basic seedlings 65,000 to 80,000 seedlings. Early in the 5 days and 12 days after plugging, late planting in the 3rd and 11th days after the insertion of topdressing tiller; Seedling growth in the latter part of the development of enhanced water and fertilizer management, vigorously growing fields for heavy sun, general field is light In the young panicle differentiation stage, the seedlings in the young panicle growth stage are applied to promote flowering and preserved fertilizers; in the late growth stage, fertilizers are supplemented with fertilizers, and phosphorus and potash fertilizers are mainly used, and the application amount of nitrogen fertilizers is well grasped. 4? Pest control: Early prevention of seedlings pay attention to the prevention of rot, the control of aphids and rice planthoppers at the heading stage. Pay attention to the prevention and control of rice gall midge in late seedlings.
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