Diyou 151 (Rice)
The main results are as follows: (1) Variety source: it is a hybrid medium-can medium-maturing combination made by Digu A / Jianghui 151 (Gui 630/IB9361-4-3-2) in Jiangyou City seed Company.
(2) characteristics: the growth period is 142 days, the plant height is 104 cm, the tillering ability is strong, the seedling stage grows vigorously, and the color is adjusted smoothly in the later stage. The ability of regeneration is strong. The leaf blast and neck blast were 0-3 grade, and the antibiotic rice blast was strong. 17 per mu. 60 thousand ears, 144 grains per ear, and the seed setting rate is 84. 8%, 1000-grain weight 27. 43 grams. The roughness rate is 80. 2%. , the rate of milled rice is 73. 4%, head rice rate 60%. 7%, the rice quality is more estimated.
(3) yield performance: from 1994 to 1995, he took part in the regional test of Zhongcan late ripening group B and Zhongcan middle ripening group, respectively. 7 、 514 . 6 kg, an increase of 1% over that of the control. 32%, Mianyang two-year regional test, the output is similar to Shanyou 63. In 1996, the average yield per mu was 525. 93 kg, 14% higher than that of Shanyou 195. 19%.
(4) suitable planting area: suitable for planting in the areas with frequent occurrence of rice blast in our province.
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Yunnan No. 4 (Rice)
Yunnan Line 4 is a new japonica rice line with high yield and high quality bred by the Japonica Rice breeding Center of Yunnan Academy of Agricultural Sciences. The combination is Yueguang / Hexi 24 / / Hexi 34. Characteristics: the plant height is about 90 cm, the tillering ability is medium, the effective ear per mu can reach about 280000 ears, the plant shape is good, the stalk is hard, the leaves are erect; the ear length is 20.3cm, the number of grains per panicle is about 120grains, the hull is golden, ripe color is good, awnless; the 1000-grain weight is 25.1 grams, not shedding grains; cold resistance, fertilizer resistance, lodging resistance; high resistance to rice blast; the whole growth period is about 174days. Rice quality
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Effect of low temperature chilling injury on Rice and its Preventive measures
Rice chilling injury means that rice suffers from the influence of low temperature below the lowest critical temperature, which leads to the abnormal growth and development of rice and the reduction of rice yield. According to the different period of injury, it can be divided into delayed chilling injury, obstacle chilling injury and mixed chilling injury. 1. Types and characteristics of rice chilling injury 1. Delayed chilling injury rice in vegetative growth period, sometimes including reproductive growth period, suffers from lower temperature for a long time, weakens the physiological activity of rice plant, delays heading and flowering, and cannot be fully filled.
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