Characteristics and High-yield cultivation techniques of Jialeyou 2, a New Japonica Hybrid Rice combination

Jialeyou 2 is a new three-line dense panicle hybrid mid-maturing late japonica rice combination bred by BT type male sterile line 151A and restorer line DH902 in Xiuzhou District, Jiaxing City, Zhejiang Province. it is a rookie in hybrid japonica rice. compared with local main varieties, it has the characteristics of strong tillering ability, fertilizer resistance and lodging resistance, large panicle and more grains, higher seed setting rate, medium maturity and higher yield. It is suitable for planting single-cropping rice in Jiangsu, Zhejiang and Shanghai, and it is the main variety to be popularized in this area.

1 yield performance

In the urban trial of Jiaxing in 2003, the average yield was 8565kg/ ha, which was 8.62% higher than that of Xiushui 63. In the urban trial of Jiaxing in 2004, the average yield was 9346.5kg/ ha, which was 12.02% higher than that of Xiushui 63. In 2004, as the "650th" project of Zhejiang Agricultural Technology extension Foundation, it was introduced into Luoxi Village, Xinyi Town, Xiuzhou District to plant single-cropping late rice. The average yield reached 10005kg/ ha. In February 2005, it passed the variety approval of Zhejiang Province. It was introduced into Zhouquan Town of Tongxiang City in 2006, and the average yield reached 10030.5kg/ ha, which was 1405.5kg/ ha higher than that of local conventional late rice (8625kg/ ha). It showed large panicle, high resistance and high yield, and was well received by farmers.

2 characteristic characteristics

2.1 the whole growth period is about 170 days, sowing in the middle of May, transplanting in the middle of June, full heading from September 4 to 5, and maturing at the end of October, which is 1 day later and 2 days later than Xiushui 63.

2.2 Plant morphology and ear-grain structure. The combination has green leaves, tall leaves and strong tillers.

The stem is stout, the plant is short, the spike is big, the ear type is large, the grain has short awn, the seed setting rate is better, the 1000-grain weight is high, the filling speed is fast, the fertilizer resistance and lodging resistance are good, the mature color is beautiful in the later stage, and the cold resistance and color conversion are better. In the regional test, the average plant height was 100.6cm, the effective panicle was 2.505 million / ha, the total grain per panicle was 184.2, the seed setting rate was 81.8%, and the 1000-grain weight was 26.3g.

2.3 meters of rice has good quality, good appearance and transparency, and good taste. According to the rice testing center of the Ministry of Agriculture, 9 of the 12 rice quality indicators reached the first-grade rice standard and the transparency reached the second-level standard.

2.4 the resistance is strong. According to the resistance identification of Plant Protection Institute of Zhejiang Academy of Agricultural Sciences, the resistance to rice blast was significantly better than that of Xiushui 63.

(3) main high-yield cultivation techniques

The high-yield cultivation techniques of Jialeyou 2 are different from the conventional main varieties. In the cultivation measures, it is necessary to give full play to its heterosis and focus on "three drops, one expansion and two changes", that is, reducing the sowing amount in the seedling field and reducing the amount of seeds used in the field. appropriately reduce the amount of nitrogen fertilizer application, expand the distance between rows and plants, improve nitrogen fertilizer fertilization methods and improve field water slurry management. The goal is to stabilize the number of ears, attack large ears, high fruiting, compete for grain weight, prevent premature senility and win high yield.

3.1 sowing and cultivating strong seedlings at the right time to achieve early sowing and early planting at a short age, so as to facilitate early development and high yield. As a single cropping late rice, it was sown from May 10 to 15, the seedling age was 25-30 days, the sowing amount in the seedling field was 150~225kg/ ha, and the seed consumption in the field was about 15~18.75kg/ ha. Transplant in mid-June.

3.2 reasonable close planting and coordination population Jialeyou 2 has strong tillers, less seeds, and its ear-grain structure is mainly large panicles. Therefore, sparse planting should be appropriate in cultivation to reduce the initial seedlings of the population, so as to lay a good foundation for stabilizing the number of ears and focusing on large panicles. Wide and narrow rows were planted with row spacing of 260m × 160m. About 225000 clumps were planted per hectare, 600000 ~ 900000 clumps of fallen seedlings were planted per hectare, and the highest seedlings were controlled to reach about 2.25 million per hectare.

3.3 apply fertilizer scientifically, reduce nitrogen, increase potassium and increase organic fertilizer and potassium fertilizer, properly control and reduce the total amount of nitrogen fertilizer and reduce the level of nitrogen used in the later stage. It is generally required to apply organic fertilizer 112.5~150kg/ hectare, potash fertilizer 150kg/ hectare, nitrogen fertilizer to pure nitrogen 225kg/ hectare, and the proportion of base fertilizer, seedling fertilizer, strong stalk fertilizer and panicle fertilizer should be 3 ∶ 4 ∶ 2 ∶ 1, and panicle fertilizer should be applied as chemical fertilizer at the beginning of August.

3.4.Seedling in shallow water, scientific management of water to transplant rice seedlings in shallow water, protection of seedlings with full water, timely exposure to the field to promote roots after turning green, and thin water to promote tillering. When the number of seedlings reached 2.7 million ~ 3 million / ha, the field was gently laid off at the end of tillering stage, thin water layer was maintained from booting to heading stage, live water was irrigated thinly after heading, and water was cut off about 7 days before harvest to prevent water cut off too early and reach yellow maturity of green stalks.

3.5 Disease and pest control, high-quality and high-yield Jialeyou No. 2 grows green at seedling stage and thrives in field stage, so it is necessary to control rice thrips at seedling stage and longitudinal leaf rollers, stem borer, sheath blight and rice false smut at heading stage in time, and pay attention to weed control, at the same time, scientific and rational application can be achieved to achieve high quality, high yield and high yield.