Hang 931 (Rice)

Hang 931 is a new high quality early indica variety bred by Hangzhou Institute of Agricultural Sciences in 1986 with Hongtu 31 and fragrant rice.

In 1994, the yield per mu of the combination of early rice breeding and tackling key problems in Zhejiang Province was 421.2kg, which was 2.7% higher than that of Zhe 852, and the average yield of 413kg and 351kg per mu in Hangzhou regional trial from 1994 to 1995 was 7.97% higher than that of Zhe 852 and 2.49% higher than that of Zhe 852. The production test in Hangzhou in 1996 showed an increase of 23.6kg per mu and an increase of 7.83% over the high-quality control Zhou 903 mu. Yuhang City demonstrated 32 mu and 105 mu of yield per mu in Yunhui Township from 1996 to 1997, and the yield per mu reached 546kg and 528kg, showing good yield and adaptability.

The growth period of Hang931 is about 107 days, which is a mid-maturing early indica, with good cold tolerance at seedling stage, large elasticity of seedling age, strong tillering ability, high panicle rate and irregular panicle layer. According to the identification from 1995 to 1996, the average grade of rice blast was 3.67-1.8, the highest grade was 5, and the bacterial blight was 2.53 in 1995. The rice quality of this variety is excellent, brown rice rate 79.44, milled rice rate 72.48, head rice rate 55.15, chalkiness 4%, gelatinization temperature 3.6 grade, gel consistency 7lmm, amylose content 12.7%. This variety has good taste and clear fragrance. It has been tasted by more than 100 people at 3 points and ranked second among 17 varieties respectively. From 1996 to 1997, the Zhejiang provincial government listed it as one of the varieties purchased with high quality and high price.

Cultivator Hangzhou Institute of Agricultural Sciences, Zhejiang Province

Regional and technical Hang 931 is a panicle-grain type variety, the sowing date is from the end of March to early April, and the seedling age is 30-35 days. Reasonable close planting, 30 000 clumps per mu and 120000 ~ 150000 fallen seedlings per mu. The three elements of nitrogen, phosphorus and potassium were applied reasonably to improve the processing quality of rice. Reasonable irrigation, dry and wet to old, to prevent water cut off too early in the later stage, in order to reduce immature rice grains, dead rice grains and chalkiness. Comprehensive control of diseases, pests and weeds should focus on prevention and prevent the application of pesticides with high concentration and high dosage, so as not to increase the pesticide residues in rice. Timely harvest is generally mastered in 85% of the ripe period for sunny harvesting. After harvest, it is best to spread the pan, thicken the sun layer, turn it in time, and dry it step by step, so as to prevent the thin layer exposure in the cement ground, so as to improve the head rice rate of rice and achieve high yield, advantage and high efficiency.