Features

Indica three-line hybrid rice variety. Planted as medium-season rice in the coastal indica rice area in the south, the whole growth period is 145.7 days, 0.3 days earlier than the control salt indica 156. Plant height is 112.0 cm, ear length is 23.2 cm, the number of effective ears per mu is 168,000, the total number of grains per ear is 149.6, the fruit setting rate is 80.4%, and the thousand-grain weight is 28.8 grams. Resistance: The comprehensive index of rice blast was 5.0 and 3.8 in the past two years, the highest level of ear neck blast loss rate is 5, the rice blast is moderately susceptible, the bacterial leaf blight is 3, and the bacterial leaf blight is moderately resistant. Comprehensive performance of salt tolerance: The salt tolerance level of the seedling stage is 3 at a salt concentration of 0.5%, and the salt tolerance level of the whole growth period is 2 at a salt concentration of 0.4%, which is relatively strong in salt tolerance. The main indicators of rice quality: whole polished rice rate 66.5%, chalkiness 1.5%, amylose content 23.4%, gel consistency 72 mm, alkali elimination value 6.5, length-to-width ratio 3.0.

Production performance

In 2017, it participated in the regional trial of the salt-alkali tolerant rice southern coastal indica rice group, with an average yield of 498.3 kg per mu, an increase of 12.8% over the control salt indica 156; in 2018, the trial was continued, with an average yield of 559.1 kg per mu, an increase of 22.2% over the control salt indica 156; the average yield of the two-year regional trial was 528.7 kg per mu, an increase of 17.5% over the control salt indica 156; in 2018, the synchronous production trial had an average yield of 504.0 kg per mu, an increase of 16.8% over the control salt indica 156.

Key points of cultivation technology

In the southern coastal indica rice area, saline-alkali land is used for one-season rice planting.

Sowing at the right time and cultivating strong seedlings. Sowing should be carried out from the end of April to the first and middle of May. The sowing amount of net seedling board per mu for wet seedling cultivation is 10-15 kg, and the sowing amount of net seedling board per mu for dry seedling cultivation is 20-25 kg. The seed amount for field is 1.0-1.5 kg/mu. Machine transplanting is generally sown around May 20, and the seed amount for field is 1.5-2.0 kg. The seedling field should be fully fertilized, weaning fertilizer should be applied early, tillering fertilizer and weeding fertilizer should be applied, and pests and diseases in the seedling field should be prevented and controlled to cultivate strong seedlings with more tillers at the right age.
Transplant at the right time and plant at a reasonable density. The wet seedlings are 30-35 days old, the dry seedlings are transplanted at 20-25 days old, and the machine transplanted seedlings are generally transplanted at 18-20 days old. The planting specification is 18,000-20,000 holes/mu, 1-2 seedlings per hole, and 60,000-80,000 basic seedlings per mu. Shallow planting and uniform planting are required to ensure the quality of planting.
Use fertilizers reasonably to promote early growth of seedlings. The general fertilizer application per mu is equivalent to about 12-14 kg of pure nitrogen, and pay attention to the combination of phosphorus and potassium fertilizers. Adhere to the fertilization principle of “promoting in the front, stabilizing in the middle, and supplementing in the back”. Base fertilizer accounts for about 60%, tillering fertilizer accounts for about 25%, and ear and grain fertilizer accounts for about 15%.
Scientific water management. Adopt the irrigation method of planting seedlings in shallow water, keeping plants alive with inch water, tillering with thin water, heading and flowering with deep water, filling with water, and alternating between dry and wet in the later stage. Use water to suppress salt, and avoid cutting off water too early to prevent salt damage. Cut off water 5-7 days before harvest to ensure green stalks and yellow seeds.
Prevent and control diseases and insects, protect seedlings and increase ears. Before sowing, soak seeds with pesticides to prevent seedling blight and dry tip nematode diseases. During the seedling stage, pay attention to the prevention and control of gray leafhoppers, rice thrips, and aphids. During the field stage, do a good job in preventing and controlling rice blast, white leaf blight, sheath blight, black streaked dwarf disease, rice false smut, stem borers, rice planthoppers and other diseases and insect pests.

Review opinion

This variety meets the national rice variety approval standards and has passed the approval. It is suitable for freshwater irrigation and planting in saline-alkali land with a soil salt content of less than 0.5% in the indica rice area of Jiangsu Province.