Dan Handao No. 2 (formerly known as K150 Rice)
Variety source: breeding from Danjing 5 system
Characteristics: this variety is a conventional japonica upland rice variety. The average growth period of one cropping upland rice in the north is 153.7 days, which is 10 days longer than that of the control Han72. The plant height is 78.51cm, the ear length is 13.72cm, the highest number of seedlings per mu is 346600, the panicle rate is 71.94%, the number of grains per ear is 99.59, the seed setting rate is 84.96%, and the 1000-grain weight is 21.9g. Resistance: the average drought resistance, leaf blast and neck blast were 2.4, 1.9 and 2.5 respectively. Main indicators of rice quality: head rice rate 71.4%, chalkiness rate 62%, chalkiness 7.9%, gel consistency 87 mm, amylose 14.36%.
Yield performance: in 2001, participated in the regional trial of upland rice in the middle and late ripening stage of the first season in northern rice region, the average yield per mu was 289.52 kg, which was 3.83% higher than that of the control Han72; in 2002, the average yield per mu was 362.41 kg, which was 10.69% higher than that of the control Han72 (extremely significant). The average yield per mu in the two-year regional trial was 326.0 kg, 7.53% higher than that of the control Han72. In the production test in 2003, the average yield per mu was 409.3 kg, which was higher than that of the control variety Han 72.
Key points of cultivation techniques: 1. Soil preparation: leveling the land before sowing, applying 2000 kg of farm fertilizer per mu, 20 kg of compound fertilizer, 15 kg of urea and 2 kg of multi-element fertilizer per mu after ditching. 2. Sowing: the row spacing of strip sowing is 30 cm, the sowing depth is 2-3 cm, and the sowing rate is 7.5 kg per mu. Suppress or step on the grid after sowing; 3, chemical weeding: Quick-killing paspalum, 60% butachlor 0.25 kg per mu, Nongsi 0.25 kg per mu, mixed with water spray; 4. Field management: timely irrigation in case of drought during seedling emergence, tillering, booting and filling stage, about 15 kg urea is applied according to seedling condition from jointing, booting to heading stage; 5, pest control: pay attention to the control of rice blast and rice false smut.
Approval opinion: after examination, the variety conforms to the national rice variety approval standard and has been approved. This variety has strong drought resistance, late ripening stage, high yield, medium susceptibility to rice blast and general rice quality. It is suitable for dry cultivation in the central and southern part of Liaoning Province and Beijing, Tianjin and Tang areas.
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Danhannuo No. 3 (formerly known as Hannuo No. 3 Rice)
Characteristics: this variety belongs to japonica conventional dry glutinous rice. The average growth period of dry direct seeding of wheat stubble in Huang-Huai area is 114d, which is 4 days later than that of Zhengzhou early japonica. The plant height is 94.8cm, the plant type is compact, the tillering ability is strong, the yield stability is good, the panicle length is 19.4cm, the total grain number per panicle is 101.2, the seed setting rate is 82.2%, and the 1000-grain weight is 24.5g. Disease resistance: drought resistance grade 1, rice blast grade 3, flax leaf spot grade 3. Main indicators of rice quality: head rice rate 64.6%, ratio of length to width 1.
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Large area crimping of rice heart leaves may be related to excessive application of dichloroquinolinic acid.
Recently, hundreds of readers from various parts of our province have called to report the phenomenon of heart leaf curl in large areas of rice seedlings, which is more common in direct seeding rice production. A lot of readers sent in diseased plants. In general, the roots of diseased plants are relatively normal, and there are no obvious disease spots and other symptoms on the leaves. After examining the diseased plants, the relevant experts from the Institute of Plant Protection of the Provincial Academy of Agricultural Sciences concluded that the curl of rice heart leaves was not caused by pathogenic microorganisms such as viruses, but could be caused by herbicides such as 2mai 4m D and dichloroquinolinic acid, or it could be physiological.
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