Chunyou 2 (Rice)

Chunyou 2 is a new high yield and early maturing japonica hybrid rice combination Chunjiang 10A, a dense panicle japonica male sterile line, and CH89, a large panicle japonica restorer line.

1. Ear grain structure and yield: plant height 103.3 cm, effective ear 152000 per mu, ear length 18.3cm, total grains per ear 175.4, seed setting rate 90.2%, 1000-grain weight 26.9g, theoretical yield 646.9 kg / mu (2002 data).

two。 The main characteristics are as follows: the whole growth period of late cropping is about 130 days, and that of single cropping is 140-145 days, which is 2-3 days shorter than that of hybrid japonica rice Yongyou 1 and similar to that of conventional japonica rice Xiushui 63. The plant is short and sturdy, not easy to abort after transplanting, turn green quickly, strong tillering ability, stout stem, compact plant type, good flag leaf, good color change at mature stage and good shedding ability. Moderate resistance to rice blast, moderate resistance to bacterial blight, and mild incidence of sheath blight in the field. It has the characteristics of high yield, lodging resistance and good rice quality.

3. Cultivation points: (1) timely and sparse sowing: single night cultivation in northern Zhejiang can be sowed at the end of May and early June, and continuous late cultivation in central and southern Zhejiang can sow around June 20-25, generally sowing about 8-12 kg per mu and 1-2 kg in Honda. Cultivate strong seedlings with tillers. (2) reasonable close planting: the plant spacing per night row can be 5 × 7 inch or 6 × 6 inch, 1-2 per clump, and 5 × 6-inch or 5 × 5.5-inch per clump, 2-3 per clump. (3) strengthen the management of fertilizer and water: the amount of fertilizer is high, about 60 piculs of standard fertilizer is applied per mu, and phosphorus and potassium fertilizer should be applied at the same time. It is appropriate to apply sufficient base fertilizer in fertilization method, to apply fertilizer early and not to cut off water too early in the later stage. (4) Prevention and control of diseases and insect pests: pay attention to the prevention of evil seedling disease, and do a good job in the prevention and control of rice blast, borer and other diseases and insect pests in the middle and later stages.