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Key Points for Rice Cultivation Management During Spring Cold Waves
I. Characteristics of Cold Wave Disasters Due to the invasion of cold air, when the temperature drops sharply by more than 10°C within 24 hours, and the minimum temperature within that day is below 5°C, it is called a cold wave. In the middle and lower reaches of the Yangtze River, when strong cold air moves southward and causes the temperature to drop by more than 10°C within 48 hours, it is also called a cold wave. Cold waves generally occur in spring and autumn, with spring being the most common, and spring cold waves mostly occur from March to May. Cold waves mainly cause seed rot, seedling rot and dead seedlings during the rice seedling stage. II. Rice Cultivation Manage
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Detailed Introduction to the Chunjiang 03 Geng Rice Variety
Chunjiang 03 Geng is a new japonica rice variety bred by the China National Rice Research Institute through hybridization with Xiushui 11 as the female parent and T82-25 as the male parent. Yield performance: in the 1994 and 1995 Hubei provincial regional trials, Chunjiang 03 Geng had an average yield of 435.64 kg per mu, ranking first, an increase of 9.74% over the control Eyi 105, a highly significant increase; in the 1994-1996 late rice variety comparison trials in Xiaogan City and district, the 5-point average yield was 468.51 kg per mu, ranking first, an increase of 16.66% over Eyi 105 (CK1),
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What are the characteristics and traits of the Chunjiangnuo rice variety?
Breeding institution: China National Rice Research Institute. Approval status: approved by the Zhejiang Provincial Crop Variety Approval Committee in 1993, and by the National Crop Variety Approval Committee in 1995. Variety registration number: GS01002-1994. Variety origin: Xiushui 11/T82-25. Characteristics and traits: a japonica-type late glutinous variety. At the seedling stage the plant is relatively short, with a compact plant type, sturdy seedlings, and relatively light leaf color; at maturity the color is good, with green stems and yellow ripening, and it threshes easily. Plant height is about 85 cm, effective
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Introduction to the Chunyou No. 2 Rice Variety and Key Cultivation Techniques
Chunyou No. 2 is a new high-yielding, early-maturing hybrid japonica rice combination developed by crossing the dense-panicle-type japonica rice male sterile line Chunjiang 10A with the large-panicle-type japonica rice restorer line CH89. 1. Panicle and grain structure and yield: plant height 103.3 cm, effective panicles per mu 152,000, panicle length 18.3 cm, total grains per panicle 175.4, seed-setting rate 90.2%, 1000-grain weight 26.9 g, theoretical yield 646.9 kg/mu (2002 data). 2. Main characteristics: as a continuous late rice, the whole growth period is about 130 days
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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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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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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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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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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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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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