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How should current rice production be managed? Technical guidance is here
At present, China's early rice production has entered the late growth stage. In southern Guangdong and Guangxi, the vast majority of early rice has entered the grain-filling stage, and a small portion has entered the maturity stage; in central Guangdong and Guangxi, heading has begun; in northern Guangdong and Guangxi, it has entered the initial heading stage to heading stage. Early rice in the middle and lower reaches of the Yangtze River has entered the milk-ripe stage and is expected to begin harvesting around July 10. Single-season rice in Northeast China is in the tillering peak stage, young panicle differentiation stage and booting stage from south to north; mid-season rice in the winter paddy field areas of Southwest China is in the booting stage, the river valley and hilly areas have begun young panicle differentiation, and the Chengdu Plain area is in the field-drying stage at the maximum tiller stage
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Current Technical Guidance on Rice Seedbed Management
Currently, some early-sowing areas are affected by sharp temperature changes caused by cold waves, and rice seedlings have suffered frost damage to varying degrees, which has affected seedbed management and will delay the transplanting process to a certain extent. In order to improve seedbed management and reduce low-temperature damage, the following technical guidance on seedbed management is hereby proposed. 1. Small-tunnel seedling cultivation. According to the weather forecast, add more covering material on the tunnel and keep it sealed for insulation. In case of frost, candles can be lit or smoke can be generated inside the tunnel to raise the temperature and prevent freezing. For medium and large tunnel seedling cultivation, ventilation should be reduced or even stopped. Straw curtains should be placed around the tunnel, plastic film should be laid flat inside the tunnel,
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Key rice diseases to focus on controlling in Guangdong currently
Bacterial leaf streak, rice blast, sheath blight and bacterial leaf blight are the four major diseases in late rice production in Guangdong, mainly damaging the leaves of plants in the early and middle stages of rice growth. The coastal typhoon-prone rice areas of our province are frequent-occurrence areas of bacterial leaf streak, while hilly and mountainous areas are mainly affected by rice blast and bacterial leaf streak. The occurrence periods, characteristics and control methods of bacterial leaf streak, rice blast and sheath blight are briefly described as follows: Bacterial leaf streak. Rice bacterial leaf streak has shown a spreading trend in Guangdong in recent years. The disease starts at the seedling stage and breaks out severely at the young panicle differentiation stage. Ty
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Detailed Introduction to the Dan Nuo No. 2 Rice Variety
Dan Nuo No. 2 rice is a new glutinous rice line developed by the Rice Experiment Station of the Dandong Academy of Agricultural Sciences, using Fan 4 as the female parent and Liaoyannuo No. 4 as the male parent through artificial sexual hybridization and years of systematic selection. It was approved and named by the Liaoning Provincial Crop Variety Approval Committee in 2001. Characteristics: seedlings have a well-developed root system and strong tillering ability; plant height is 100 cm; the main stem has 16 leaves; leaves are clean and upright. The plant is compact, with thick and sturdy stems and resistance to lodging, and matures with green stalks; panicle length is 15 cm-16 cm; panicles are erect; each panicle has 100-1
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Danjing 6 is a rice variety suitable for dryland cultivation.
Variety source: Bred by hybridization at the Dandong Academy of Agricultural Sciences. Characteristics: Growth period 130 days, plant height 90 cm, moderate tillering, well-developed root system, loose panicle type, panicle length 15.4 cm, average number of grains per panicle 104.4, sparse short awns, 1000-grain weight 25 g, mature with green stems, strong drought tolerance, resistant to rice blast and rice false smut, good eating quality. Suitable for planting in low-lying waterlogged land, rainfed rice fields, or dry fields with irrigation conditions. Cultivation points: Sow in the Dalian area from late April to early May, sowing rate 7-9 k
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How is the Danjing No. 3 rice variety?
Variety source: Bred by the Dandong City Agricultural Science Research Institute, introduced in 1984. Characteristics: The full growth period is 165 days. Seedlings grow vigorously. Mature plants are 100-110 cm tall. The plant type is compact, with strong tillering ability. The average number of effective panicles per mu is about 260,000. Panicle length is about 18 cm. Each panicle has about 100 grains. The seed setting rate is above 80%. The grains are yellow-white, awnless with occasional sparse short awns. The 1000-grain weight is about 25 g. The brown rice rate is 85%, and the head rice rate is 78.5%. The rice quality is excellent and the taste is good. It is resistant to rice blast and bacterial leaf blight, and moderately resistant to sheath blight and rice false smut. Its lodging resistance is moderate.
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Introduction to the Danhannuo No. 3 rice variety, formerly known as Hannuo No. 3
Characteristics: This variety is a japonica-type conventional dryland glutinous rice. In the Huang-Huai region under dry direct seeding after wheat harvest, the average whole growth period is 114 days, 4 days later maturing than the control Zhengzhou Zaojing. Plant height is 94.8 cm, the plant type is relatively compact, tillering ability is relatively strong, and yield stability is good. Panicle length is 19.4 cm, total grains per panicle is 101.2, seed setting rate is 82.2%, and 1000-grain weight is 24.5 g. Disease resistance: drought resistance grade 1, rice blast grade 3, narrow brown leaf spot grade 3. Main rice quality indicators: head rice rate 64.6%, length-to-width ratio 1.
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Introduction to the Rice Variety Danhandao No. 2 (formerly named k150)
Variety source: Systematically selected and bred from Danjing No. 5. Characteristics: This variety is a conventional japonica-type upland rice variety. When grown as a single-season upland rice in the north, the average whole growth period is 153.7 days, 10 days longer than the control Han 72. Plant height is 78.51 cm, panicle length is 13.72 cm, the maximum number of seedlings per mu is 346,600 plants, the panicle-forming rate is 71.94%, the number of grains per panicle is 99.59, the seed-setting rate is 84.96%, and the 1000-grain weight is 21.9 g. Resistance: The average field performance across test sites showed drought resistance grade 2.4, leaf
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Large-scale leaf-rolling of the central leaves of rice may be related to excessive application of quinclorac
For some time recently, hundreds of readers across our province have called to report large-scale leaf-rolling of the central leaves of rice seedlings, which is even more common in direct-seeded rice production. Many readers brought in diseased plants. The root systems of the diseased plants are generally fairly normal, and there are no obvious disease spots or other symptoms on the leaves. After examining the submitted diseased plants, relevant experts from the Institute of Plant Protection of the Provincial Academy of Agricultural Sciences and other units preliminarily diagnosed that the leaf-rolling of the central leaves of rice is not caused by viruses or other pathogenic microorganisms, but may be phytotoxicity caused by herbicides such as 2,4-D and quinclorac, or may be caused by physiological
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What measures promote rice root development?
1. Sow early at the right time. When the temperature stabilizes at 5°C, begin sowing and raising seedlings; do not raise seedlings for the May crop. When the temperature stabilizes at 13°C, begin transplanting; do not transplant for the June crop. Transplant during the high-yield period to gain accumulated temperature, which is beneficial to root development. 2. Prepare the land carefully and create the conditions. Do a good job of plowing and rotary tilling; generally the plowing depth is 20 cm and the rotary tilling depth is 14 cm. Keep the plowing or rotary tilling depth uniform, so that the mud is not exposed even in water an inch deep, creating the conditions for root development. 3. Strengthen management and promote development. First, seedling-field management: control the temperature well, water reasonably, spray fertilizer on the leaves, and prevent
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