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How to prevent rice sheath blight? Beware of high temperature and high humidity weather
Sheath blight, also known as banded leaf blight, has a great impact on the growth and development of rice. It not only weakens the absorption capacity of the root system, but also affects the photosynthesis of leaves, resulting in an increase in empty and shriveled grains, a decrease in 1000-grain weight and a decline in yield. Therefore, attention should be paid to the prevention and control of sheath blight in production. The following introduces the main symptoms, occurrence characteristics and control methods of this disease for reference. Main symptoms When rice leaf sheaths are infected, small dark green water-soaked spots with blurred edges appear near the water surface, later expanding into oval or cloud-like shapes, with the center grayish green
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Impact of High-Temperature Heat Damage on Rice Production in Fanchang County and Defensive and Remedial Measures
In the process of rice production, the climate factors with the greatest impact and the hardest to control are temperature and water. Reasonable irrigation can supplement and regulate water, but temperature is difficult to control, and it exerts a major influence on the entire life of rice. Rice is the main crop in grain production in Fanchang County, ranking first among grain crops in both planting area and total output. At present, the rice planting area in Fanchang County is about 16,360 hectares (including the multiple cropping index), of which about 13,191 hectares are middle-season indica rice (mainly hybrid rice), about 1,514 hectares are early rice, and about 1,655 hectares are double-cropping late rice.
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Rice direct seeding machine successfully developed, efficient and versatile, boosting rice sowing
Recently, a "Multifunctional Soil-Covering Direct Seeding Machine Rice Mechanical Direct Seeding Field Demonstration" organized by the China National Rice Research Institute was held in Buqiao Village, Fuyang City, Zhejiang Province, with more than 40 experts from home and abroad attending the field observation event. In recent years, China's rice mechanical transplanting technology has developed rapidly, and a number of different types of transplanters suited to China's rice production have been developed and produced. However, the development and research of rice direct seeding machines and mechanical direct seeding technology have lagged relatively behind, and no mainstream rice mechanical direct seeding technology has yet taken shape. To overcome the problems of poor seedling establishment, easy lodging, premature aging, and difficult and costly weed control
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Detailed Introduction to the Plateau Japonica No. 1 Rice Variety
(1) Variety origin: A high-altitude japonica rice variety developed by the Seed Station of Yanyuan County, Liangshan Prefecture in 1978 from the intermediate material "7801-10--2'', through selection and breeding into the stable line "8790--1". (2) Characteristics: This line has a compact plant type, upright flag leaves, green leaves, light green internodes, strong cold tolerance at the seedling stage, vigorous growth, strong tillering ability, and good color change in the later stage. Plant height 90 cm, whole growth period 185 days, 4-7 days later maturing than the control variety Japonica 9. Panicle length 17 cm, grain number per panicle 1
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Detailed Introduction to the Plateau Japonica 2 Rice Variety
(1) Variety source: Plateau Japonica 2 is a new high-cold japonica rice variety bred by the Yanyuan County Seed Station through systematic selection from the cross-breeding material 7801-10-2. (2) Characteristics: This variety has a compact plant type, is tolerant to fertilizer and resistant to lodging, and has green leaves. It has strong tillering ability; the whole growth period is 186-190 days, 5-7 days later maturing than the control Japonica 9. The plant height is about 100 cm, the effective panicles per mu are 260,000-290,000, the panicle length is 19 cm, the number of grains per panicle is 108, the seed setting rate is about 73%, and the brown rice rate is 82.9
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Rice Major Pests and Diseases in Gejiu City: Occurrence and Control Methods
I. Rice Planthoppers 1. Damage characteristics: Rice planthoppers, also known as white gnats, are migratory pests with the characteristics of long-distance migration and outbreak damage. The common species include the smaller brown planthopper and the white-backed planthopper. They occur in all rice-growing areas of the city, mainly damaging rice, followed by wheat and corn, and also parasitize grasses such as Chinese sprangletop and other gramineous weeds. Adults and nymphs gather in clusters at the base of rice clumps and on leaves to suck sap. The damaged parts show elongated brown spots, and in severe cases the lower stems turn black and the entire plant dies.
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Detailed introduction to the rice variety Guyou No. 14
After the "father of hybrid rice" Yuan Longping bred hybrid rice in the 1970s, the world experienced a second Green Revolution. However, hybrid rice seed production procedures are complicated and expensive, and there are many fake seeds on the market. How to breed apomictic rice that can be used as seed generation after generation became the long-cherished wish of many breeders. Now, apomictic rice bred by researcher Chen Jiansan, a famous breeder at the Chinese Academy of Agricultural Sciences, and other experts has realized this wish. The biggest features of apomictic rice: besides not needing annual seed production, it has also made great breakthroughs in rice quality, yield and resistance
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Four key points to master in rice fertilization
First, pay attention to applying sufficient organic fertilizer. Organic fertilizer contains various nutrients, can improve soil aeration and its characteristics of absorbing fertilizer and retaining water, promote robust growth of rice plants, and achieve high yield and good quality. Organic fertilizer is mainly used as base fertilizer, applying 30-40 loads of decomposed farmyard manure per mu, or 30-40 kg of cake fertilizer, and 40-50 loads of human and livestock manure can also be applied after plowing and before flooding. Second, pay attention to controlling nitrogen fertilizer. Excessive application of nitrogen fertilizer to rice will not only cause an increase in ineffective tillering, greening, lodging, and intensified pests and diseases, leading to more empty and shriveled grains, a decline in the seed-setting rate, and affecting rice yield.
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Division of Rice Production Regions in Guangdong and Analysis of the Characteristics of Each Region
Guangdong Province is bordered by the Nanling Mountains to the north and the South China Sea to the south, with vast rice-growing areas; rice is cultivated from tidal fields at sea level to mountain terraces at an elevation of one thousand meters. Guangdong has a monsoon subtropical and tropical climate. The safe growth period for rice is 220-280 days in most places. The rice-growing season is long; for example, in Guangzhou the early rice is generally sown in early March and harvested in mid-July; typical late rice varieties are sown in late June, reach full heading around October 10, and are harvested in mid-November; the "fanqiu" (second cropping of early rice) reaches full heading in early to mid-July. Abundant rainfall and long sunshine hours are all conditions favorable to rice growth.
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Guangxi Takes the Lead in Breeding an Aromatic Red Rice CMS Line
Recently, the Science and Technology Department of Guangxi Autonomous Region organized relevant experts to conduct a field technical appraisal of the wild-abortive type CMS line Betel Nut Red A, bred by the Xiangzhou Huang Family Rice Research Institute. After rigorous field investigation and indoor microscopic examination, and after hearing the breeder's technical report and questions and answers, the expert group determined that Betel Nut Red A meets the standards for a rice CMS line. It is the first aromatic red rice CMS line bred in China, with strong innovation. Betel Nut Red A has stable agronomic traits, stable male sterility, good flowering habits, relatively good grain quality, and a resistance level of highly susceptible.
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