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Brief Introduction to the High-Quality Hybrid Aromatic Rice Variety Chuanxiangyou 2
1. Origin of the combination: Chuanxiangyou 2 is a high-quality hybrid aromatic rice developed by our institute by test-crossing the newly bred male sterile line Chuanxiang 29A with the newly bred restorer line Chenghui 177. 2. Yield and main characteristics: Chuanxiangyou 2 is a medium indica late-maturing hybrid combination, with a sowing-to-heading period 5 d longer than that of Shanyou 63. Through years of multi-site trials, the yield per mu was 573.3 kg, an increase of 7.8% over the control Shanyou 63. Chuanxiangyou 2 has a plant height of 117.2 cm, 150,000 effective panicles per mu, an average of 182 grains per panicle, a seed-setting rate of 82.2%, and a 1000-grain weight of 28.
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High-quality hybrid japonica rice Dianza 80 passes variety certification
The new high-quality hybrid japonica rice variety "Dianza 80", bred by the Yunnan Dian-type Hybrid Rice Research Center and the Gejiu City Seed Company, was approved at the fifth meeting of the fifth Yunnan Provincial Crop Variety Certification Committee. "Dianza 80" has a full growth period of 171 days. Plant height 94.5 cm, panicle length 19.6 cm, total grains per panicle 157 grains, filled grains per panicle 115.2 grains, seed setting rate 72%, 1000-grain weight 25 g; leaves erect at seedling stage, tolerant to fertilizer, uniform growth; flag leaf erect, compact plant type, strong till
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Characteristics and High-Yield Cultivation Techniques of the New Hybrid Indica Rice Combination 29 You 559
29 You 559 is a new three-line hybrid indica rice combination bred by Jiangsu Xuzhou Higher Vocational School of Bioengineering and the Jiangsu Coastal Area Institute of Agricultural Sciences by crossing the self-bred male sterile line 29A with the self-bred restorer line Yanhui 559. 29A is the first indica three-line male sterile line bred in Jiangsu, and the new combination 29 You 559, developed by crossing 29A with Yanhui 559, shows obvious heterosis and passed the Jiangsu Provincial Crop Variety Approval in January 2003. Heterosis performance of 29 You 559 In 1999, it participated in the Jiangsu Provincial Hybrid
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New hybrid indica rice combination K You 818: high yield, good quality and disease resistance
K You 818 is a new hybrid indica rice combination with high yield, good quality and disease resistance, bred by the Institute of Agricultural Sciences of the Lixiahe Region of Jiangsu, and produced and distributed exclusively by Nanjing Shenzhou Seed Industry Co., Ltd. This variety has applied for national new variety protection and patent, with the announcement number: CNA000548E. It passed the Jiangsu provincial approval in 2001, and in the same year entered the national southern rice region high-yield group regional trial, with a yield of 660 kg per mu, ranking first among the tested combinations. In 2002, it exceptionally entered the national southern rice region production trial, with a yield increase of 10.65% per mu compared with the control, ranking first, making it
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Breeding and Application of Tianfengyou 269, a High-Yield, High-Quality, Multi-Resistant Hybrid Indica Rice
1 Breeding Process Tianfengyou 269 (formerly named Yanyou 269) is a new high-yield, high-quality, multi-resistant three-line hybrid indica rice combination bred in 2002 by the Institute of Agricultural Sciences of the Coastal Region of Jiangsu, by crossing Tianfeng A, developed by the Guangdong Academy of Agricultural Sciences, with the restorer line Yanhui 269, which was self-bred by our institute. The self-bred restorer line Yanhui 269 was produced in the summer of 1995 by making a cross with Yanhui 559 as the female parent and Yanhui 469 (an intermediate material of our institute) as the male parent, obtaining 26 hybrid seeds, which were brought to Sanya, Hainan in the winter of the same year for planting
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Super-high-yield new hybrid japonica rice variety Qiuyou Jinfeng successfully bred
The super-high-yield new hybrid japonica rice variety "Qiuyou Jinfeng", independently bred by Shanghai scientists, after 3 years of production demonstration planting, reached a per-mu yield of 801.9 kg, and has recently passed expert acceptance inspection. On December 31, 2006, a reporter learned at the Shanghai Minhang District Agricultural Science Research Institute that the cultivation of the excellent variety "Qiuyou Jinfeng" uses the genetic differences between the two parents of indica rice and japonica rice, with an excellent late japonica sterile line as the female parent, and selects excellent indica rice and excellent japonica rice restorer lines as the male parent, through "indica-japonica bridging" technology, applying
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Key Technical Points for Integrated High-Efficiency Duck-Pig-Fish Farming
Through integrated farming, ducks, pigs, and fish can make full and rational use of energy, achieving the goals of saving feed and attaining high yield and high efficiency. The integrated high-efficiency duck-pig-fish farming method is: 1. Select superior breeds. For ducks, Cherry Valley ducks are best; for pigs, crossbred Landrace pigs and other improved breeds; for fish, mainly silver carp, bighead carp, black carp, grass carp, etc. These breeds tolerate coarse feed and grow fast. 2. Management of duck pens, pig houses, and fish ponds. Duck pens, pig houses, and fish ponds should be concentrated and conveniently located for transport to facilitate management. Keep the
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High temperatures trigger heat stress in pigs, affecting their physical health
The high-temperature environment from June to September each year disrupts pigs' sex hormone secretion, throwing their normal estrus mechanism out of order, so that estrus symptoms become inconspicuous or the animals do not come into heat at all; high temperatures make pigs devote most of their energy to resisting heat stress, correspondingly weakening their other bodily functions, and for lactating sows and fattening pigs that need to eat large amounts of feed, this leads to insufficient nutrition and the phenomena of low milk output and slow growth; high temperatures make heat dissipation from the boar's testicles difficult, intensify sperm metabolism and shorten sperm lifespan, so that the motility of ejaculated sperm decreases or the sperm even die; high temperatures also increase the death of newly fertilized eggs and make implantation of the fertilized eggs more difficult, thereby lowering the conception rate of summer breeding.
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How should high-quality cotton seed be planted to produce good seedlings?
At present, most cotton-growing regions in China use nutrient-pot seedling raising. Generally, to evaluate whether cotton seed emergence is good or poor, one looks at the emergence rate and, second, at the seedling survival rate. The reasons for a low emergence rate are: first, in some cotton seed, the proportion of autumn bolls or late-autumn bolls is too large, which lowers the germination rate. The germination rate of seed selected from summer bolls or mid-season flowers is mostly above 80%; second, during cotton seed processing, quality control was not strict, and the proportion of damaged seed exceeded the standard; third, before or after sowing cotton seed, no fungicide disinfection was carried out on the pot soil and the soil covering the pots, or the disinfectant chosen was not the right one; fourth, this year's cotton seed
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Raising cotton seedlings in foam tray substrate with hydroponics gives higher returns
The widely promoted F1 hybrid cotton variety Ezamian No. 10 was selected to compare the cultivation effects of plastic soft-tray substrate seedling raising, foam tray substrate hydroponic seedling raising, and fertile-soil nutrient bowl seedling raising. The results showed that on alluvial fluvo-aquic soil in the Wuhan area, with cotton planted in continuous cropping with rapeseed, the net income per unit area was highest with foam tray substrate hydroponic seedling raising, followed by plastic soft-tray substrate seedling raising. Therefore, matching cotton varieties with simplified, light-labor cultivation techniques selected according to local conditions and promoting them together can improve the profitability of cotton growing.
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