Jingguang 651 (Jing651) rice

I. Source of varieties

It was bred in 1996 by the Institute of crops, Beijing Academy of Agricultural and Forestry Sciences. The parent is C9162-3 / Jinghua 106. It was approved by Beijing in 2000.

2. Characteristic characteristics

The whole growth period of wheat stubble rice in Beijing plain is 130-135 days, which is 3 days longer than that of Zhongzuo 37. 160-170 days of cropping rice in Yanqing. The plant height is 89.4 cm, the culm is hard and resistant to lodging. The leaves are straight and dark. The tillering ability is moderate. The ear neck is very short, the ear is large, awnless, light leaf, light shell, grain oval. The number of effective panicles per mu is 217000, the total grains per panicle is 106.2, the seed setting rate is 85.3%, and the 1000-grain weight is 24.6g. It was not sensitive to light, and the branches blackened at low temperature in the later stage.

Disease resistance: the field showed resistance to stripe leaf blight and middle susceptibility to seedling blast.

Quality analysis: Brown rice rate 82.1%, milled rice rate 75.4%, head rice rate 71.9%, grain length 5.1 mm, aspect ratio 1.7, chalkiness rate 10%, chalkiness 1.2%, transparency 2, gelatinization temperature (alkali elimination value) 7, gel consistency 68 mm, amylose content 16.6%, protein content 9.4%. Among them, 6 items reached the first grade of the Ministry and 4 reached the second level of the Ministry.

III. Key points of cultivation techniques

The main results are as follows: 1. The suitable sowing date for wheat stubble rice is the middle of May, and strive to plant early. It is required to sparsely sow strong seedlings, sowing about 100 grams per square meter (equivalent to 67 kilograms per mu), and strictly disinfect seeds before sowing to prevent evil seedling disease. Medium rice can be sown at the beginning of May and finished before wheat harvest.

2. The transplanting specifications can generally use row spacing of 20-25 cm (avoid being too large), hole spacing of about 15 cm, and 2-3 seedlings per hole (not too much).

3. On the basis of strong seedlings and less seedlings per hole, the key to high yield is to strive for the number of panicles, and the key is to improve the panicle rate. Generally, it can be dried when the total number of stems per mu reaches the planned panicle number, return water in time to the spikelet differentiation period (blocking the drainage outlet and storing Rain Water in the rainy season), and apply appropriate amount of fertilizer to increase the panicle rate and the number of grains per spike.

4. The water layer should be maintained at booting and heading stage so as not to produce or aggravate the phenomenon of neck wrapping.

5. In the cultivation of medium rice, attention should be paid to the control of sheath blight. Attention should be paid to the detection and prevention of panicle neck plague in the areas with frequent occurrence of panicle neck blast. Pay attention to the control of white-backed planthopper and borer.

IV. Areas suitable for planting

It is suitable for wheat stubble rice or late planting middle rice in Beijing and Tianjin plain area, and single cropping rice in other autumn light cultivation areas. It is suitable for planting in plots with high fertility level.