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What are the control methods for zinc deficiency stunt seedling in rice?
Phosphorus deficiency stunt seedling generally occurs at the tillering stage after seedling recovery, manifesting as slow growth, short plants, slender and upright leaves, dark green leaf color, neat leaf cluster tips, significantly shortened leaf sheath distance, red tips on some tiller leaves, and brownish-red or even dead old leaves. Causes: first, the soil lacks available phosphorus; second, low soil temperature and water temperature, or the presence of reducing harmful substances such as hydrogen sulfide and ferrous iron in the soil, which reduces the root's absorption capacity; third, excessive application of nitrogen fertilizer, causing the effective nutrients to lose their relative balance. Control measures are based on the available phosphorus data measured by the "soil testing and fertilizer recommendation method"
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Introduction to the Liaoyou 1052 Rice Variety
Liaoyou 1052 is a new hybrid aromatic rice combination developed by the Rice Research Institute of Liaoning Province, crossing a fragrant rice male-sterile line with a high outcrossing rate and a high-quality restorer line. Characteristics: The growth period of Liaoyou 1052 is about 158 days, the plant height is 116-118 cm, the average panicle length is 19.35 cm, the total number of spikelets per panicle is 180, and the number of filled grains is 140. It belongs to the large-panicle type of rice combination, with a 1000-grain weight of 24.6 g. After transplanting, seedlings establish quickly, individual plants grow vigorously, and tillering ability is moderate, with an average of 15 panicles per hill and a high productive-stem rate.
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Introduction to the Liaoyannuo No. 10 Rice Variety
Breeding institution: Northern Agricultural Technology Development Corporation. Approval status: Approved by the Crop Variety Approval Committee of Liaoning Province, and approved by the National Crop Variety Approval Committee in 1999. Variety approval number: Guoshendao 990002. Variety source: Selected from the Liaojing No. 5 line. Characteristics: Seedlings robust, root system well developed, plant type compact, stems tough, plant height about 90 cm, main stem with 15 leaves, leaves erect and short, wide, and thick, leaf color relatively dark, high light energy utilization rate; panicle club-
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Detailed Introduction to the Rice Variety Liaoyan No. 2
Breeding institution: Liaoning Institute of Saline-Alkali Land Utilization. Approval status: approved by the Liaoning Provincial Crop Variety Approval Committee in 1988, and by the National Crop Variety Approval Committee in 1991. Variety registration number: GS01022-1990. Variety source: systematically selected and bred from the Fengjin variety. Characteristics: a late-maturing japonica rice variety. Plant height about 90 cm, compact plant type, sturdy seedlings, well-developed root system, many tillers, relatively long flag leaf, effective tillering rate above 70%,
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Introduction to the Characteristics of the Liaoyan 283 Rice Variety
Breeding unit: Northern Agricultural Technology Corporation. Approval status: approved by the Liaoning Provincial Crop Variety Approval Committee in l993, and by the National Crop Variety Approval Committee in 1998. Variety approval number: Guoshen Dao 980004. Variety source: Zhongdan No. 2 / Changbai No. 6. Characteristics: a japonica rice variety. Plant height 90 cm, 15 leaves on the main stem, leaves erect, stems tough, plant type compact, flag leaf erect. It can reach 300,000-350,000 panicles per mu,
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Introduction to the Characteristics of the Liaoyan No. 12 Rice Variety
I. Variety Origin: Bred by Panjin North Agricultural Technology Development Co., Ltd. in 1998. This variety is a japonica-type medium-late maturing high-quality rice selected from an M146 mutant. It was approved by Beijing in 2000. II. Characteristics: When transplanted on June 21 in the Beijing region, it heads on August 13, with a whole growth period of 146 days, the same maturity period as Jinzhu No. 1. In Liaoning, the growth period is about 157 days, belonging to a medium-late maturing variety. The seeds have relatively strong germination vigor, the seedlings are relatively strong, the leaves are semi-erect and green, and the root system is well developed; it is tolerant to saline-alkali, drought-resistant, disease-resistant
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Introduction to the Characteristics and Traits of the Rice Variety Liaonong 968
I. Origin: Liaonong 968 was bred by the Institute of Crop Cultivation of the Liaoning Academy of Agricultural Sciences from natural hybrid progeny of C57. II. Characteristics and Traits: 1. Morphological characteristics: plant height 100CM, strong tillering ability, panicle length 17-18CM, 90-100 grains per panicle, high seed-setting rate, awnless, semi-erect panicle type, leaves upright. 2. Growth period: the growth period is about 158 days, 1-2 days earlier than Liaojing 294, and 1-2 days later than Liaojing 454-17. 3. Resistance: moderately resistant to rice blast, slightly susceptible to rice
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Introduction to the Liaogeng 92-34 Rice Variety
Characteristics: This variety is a conventional japonica-type rice variety. When grown in the late-maturing rice regions of Northeast and Northwest China, its full growth period is 156.4 days, 4 days later than the control Qiuguang. Plant height is 88.5 cm, total grains per panicle 108.7, seed-setting rate 88.1%, and 1000-grain weight 21.9 g. Resistance: rice blast grade 3. Main grain quality indicators: head rice rate 65%, chalky grain rate 4%, chalkiness degree 0.3%, gel consistency 73 mm, amylose content 15.7%. Yield performance: In 2002, it was entered in the Qiuguang group regional trial of the northern rice region,
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Introduction to the Rice Variety Liaojing 92-34
The new rice variety Liaojing 92-34 was developed by the Liaoning Provincial Rice Research Institute in 1992 through artificial hybridization and systematic selection, using 87-73 as the female parent and 87-337 as the male parent. This variety has the characteristics of high yield, good quality, early maturity, and strong resistance. It was approved by the Liaoning Provincial Crop Variety Committee in 2002. Characteristics: At the seedling stage, the leaves are dark green and the seedlings are robust. After transplanting, the seedlings recover quickly, tiller profusely, and have upright leaves with a suitable angle to the stem. Each panicle has 100-110 grains, and the 1000-grain weight is about 23g. In the Shenyang area, the growth period is 1
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Liaojing 454-18 Rice Variety Introduction
Variety source: Introduced from Panjin by the Jinzhou District Grain and Oil Technology Extension Center. Characteristics: Growth period 156 days, compact plant type, sturdy stems, erect leaves, relatively strong tillering ability, plant height 97 cm, semi-spreading panicle type, 110-120 grains per panicle, 1000-grain weight 26 g, good grain quality, tolerant to fertilizer and water, lodging-resistant, resistant to rice blast, slightly susceptible to rice false smut, very lightly affected by sheath blight, matures with green stems. Cultivation points: Strictly disinfect seeds, dry seedling raising, cultivate strong seedlings, row-to-hole spacing 9 x 4 cun, 3-4 seedlings per hole, apply 65-70 kg of standard nitrogen fertilizer per mu,
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