Jingchuyou 148 (Rice)

Jingchu you 148, a late hybrid rice variety bred by Jingzhou seed Corporation with male sterile line "Jingchu 814A" and restorer line "R148", was approved by Hubei crop Variety approval Committee in 2002 (variety approval no. 017-2002). It was mainly promoted by the Hubei Provincial Department of Agriculture in 2003.

This variety participated in the regional trial of late hybrid rice varieties in Hubei Province from 2000 to 2001. In the 2001 regional test, it showed obvious advantages in rice quality, yield, growth period and comprehensive agronomic characters, which was designated as "New varieties displayed at the national level in 2000" by the National Agricultural Technology extension Center. it is outstanding in 10 national late rice varieties. It performed prominently in the 2001 regional trial, and was approved on February 1, 2002, and was demonstrated by the National Agricultural Technology extension Center as "2002 National demonstration New Variety". After a large-scale demonstration, it is of high quality and high efficiency; in 2003, it continued to be designated as a new national demonstration variety, demonstrating and popularizing on a larger scale.

Through the experimental identification, demonstration and demonstration of Jingchuyou 148 for three consecutive years, we have obtained the following understanding of this variety:

Quality and yield: determined by the Food quality Supervision and Inspection Center of the Ministry of Agriculture, the rate of brown rice is 80.5%, the rate of head rice is 61.7%, the ratio of length to width of rice grain is 3.1, the rate of chalky grain is 27%, the degree of chalkiness is 2.4%, the content of amylose is 21.6%, and the gel consistency is 59 mm. The main reason is that the physical and chemical indexes meet the national quality rice quality standard. The average yield per mu in the two-year regional trial was 506.3 kg, which was 7.31% higher than that of the control variety Shanyou 64. Among them: in 2000, the yield per mu was 487.52 kg, 8.43% higher than that of Shanyou 64, reaching a very significant level; in 2001, the yield per mu was 525.80 kg, 6.28% higher than that of Shanyou 64, reaching a very significant level. Tested and displayed in Shishou and Xishui in 2001, the average yield per mu was 564.3 kg, 10.32% higher than that of Shanyou 64. In 2002, 754.5 mu were demonstrated in Shishou, with an average yield of 536.0 kg per mu, an increase of 8.9% over Shanyou 64, reaching a very significant level.

Characteristics: this variety belongs to medium-mature indica late rice. The plant type is moderate, the stem is stout, the leaf color is light green, and the sword leaf is tall and straight. The tillering ability is medium and the growth potential is strong. The ear is big and there are many grains, and the late ripening phase is good. In the regional test, the effective panicle per mu was 220000, the plant height was 96.3cm, the ear length was 22.6cm, the total grains per panicle was 121.9, the number of filled grains was 99.8, the seed setting rate was 81.9%, and the 1000-grain weight was 25.94g. The whole growth period is 117.2 days, which is 1.6 days shorter than Shanyou 64. The resistance was identified as susceptible to bacterial blight and highly susceptible to panicle neck blast.

Cultivation points: 1. Sowing at the right time and transplanting in time. Sowing on June 15-20, the sowing rate of seedling field was 10 kg per mu, the seed used in field was 1.5 kg / mu, and the seedling age was 25ml / 30 days, the phenomenon of early heading was easy to occur when the seedling age was too long. 2. Reasonable close planting. The row spacing is 13.3cm * 20.0cm, with 2 grain seedlings per hole and 15-180000 basic seedlings per mu. 3. Fertilize reasonably and manage water scientifically. Apply 12 kg of pure nitrogen, 6 kg of phosphorus pentoxide and 9 kg of potassium oxide per mu; all phosphate fertilizer is used as base fertilizer, 70% of nitrogen fertilizer as base fertilizer, and 30% as topdressing. Shallow water irrigation timely control seedlings in the field, avoid cutting off water too early in the later stage. 4. pay attention to the prevention and control of diseases and insect pests. Control rice thrips at seedling stage, rice borer and rice planthopper in field, pay special attention to rice stem borer, and focus on rice blast at broken heading stage and full heading stage. 5. Timely harvest and mechanical threshing to ensure the quality of rice.

Suitable planting range: suitable for planting late rice in disease-free and lightly diseased areas of Hubei Province.