Shennong No. 7 (formerly Shennong 9457 Rice)
Characteristics: this variety is a conventional japonica rice variety. The whole growth period of this variety is 152.3 days in the northeast and northwest precocious rice areas, which is 7 days later than that of JiYujing, the control. The plant height is 93.8 cm, the total number of grains per panicle is 73.1, the seed setting rate is 90.4%, and the 1000-grain weight is 26.2 grams. Rice blast is grade 7. The main indicators of rice quality: head rice rate 68.4%, chalky rice rate 12%, chalkiness 1.2%, gel consistency 85 mm, amylose content 16.3%.
Yield performance: in the regional trial of Jiyu japonica group in northern rice region in 2001, the average yield per mu was 588.7 kg, which was 2.9% higher than that of Jiyujing (not significant). In 2002, the average mu was 607kg, which was 1.2% lower than that of JiYujing (not significant). The average yield per mu in the two-year regional trial was 597.9 kg, 0.7% higher than that of JiYujing. In the production test in 2003, the average yield per mu was 542.7 kg, which was 0.8% higher than that of JiYujing, the control.
Key points of cultivation techniques: 1, cultivate strong seedlings: according to local planting habits and Jiyujing simultaneous sowing, ordinary dry-raised seedlings sow 150-200 grams per square meter; 2, transplant: row spacing 30 cm, plant spacing 13.3-16.7 cm, 3 grain seedlings per hole; 3, fertilizer and water management: 45-50 kg of ammonium sulfate per mu, 20-30 kg of superphosphate and 10 kg of potassium sulfate. Water slurry management should achieve shallow water transplanting rice seedlings, shallow wet tillering, enough seedlings to dry the field, shallow water to raise the fetus, shallow wet heading, blooming in an inch of water, moist strong seeds; 4, pest control: pay attention to the prevention and control of rice blast.
Approval opinion: after examination, the variety conforms to the national rice variety approval standard and has been approved. The variety is late in maturity, medium in yield, susceptible to rice blast and excellent in rice quality. It is suitable to be planted in the upper limit of the first accumulated temperate zone in Heilongjiang Province, the middle mature rice area of Jilin Province, the northeast of Liaoning Province, the Yellow River diversion Irrigation area of Ningxia, the southeast of Inner Mongolia and the Hexi Corridor of Gansu Province.
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Raw gypsum powder can control physiological bacterial blight of rice
Rice physiological bacterial blight often occurs in cold soaked fields in Shanchong and unripe paddy fields with organic green manure. The disease often occurs at the tillering stage of rice, which shows that there are few tillers of rice, the leaves turn yellowish brown, and there are irregular tea brown spots on one or two leaves at the base, and some are mistaken for leaf rice blast. Pull out the grass, the root system is yellowish brown, the heavy is black, and the seedlings are not long, as the saying goes, "Fa Qiu". There are three main reasons for the occurrence of physiological red blight: first, toxic substances such as hydrogen sulfide are produced during the decomposition of green manure; second, some cold soaking
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Shaoxian No. 1 (Rice)
Shaoxian 1 (formerly Shao 93-9) is a new mid-maturing early early indica variety bred by crossing Yuenuo 1 with Lunhui 422 and backcrossing with Yuenuo 1 in the Institute of Agricultural Sciences of Shaoxing City, Zhejiang Province. The characteristic of Shaoxian 1 is that the middle maturity is earlier, and the whole growth period is 3 days earlier than that of the control variety Zhe 852. It has wide adaptability and is suitable for light cultivation such as direct seeding or seedling throwing in early and late seasons in the area of double cropping rice in Zhejiang Province. Medium tiller, compact plant, strong cold tolerance, especially during heading and flowering, can resist the influence of adverse climatic factors.
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