Liaojing 92-34 (Rice)

Liaojing 92-34, a new rice variety, was bred by the Rice Research Institute of Liaoning Province in 1992 using 87-73 as female parent and 87-337 as male parent. It was approved by Crop Variety Committee of Liaoning Province in 2002.

Characteristics: seedling leaves dark green, seedlings robust. After transplanting, the seedlings are slow and fast, the tillers are more, the leaves are straight, the angle with the stem is appropriate, 100~110 seeds per panicle, and the 1000-grain weight is about 23g. The growth period is 155~157 days in Shenyang area. Generally, sowing in early April, transplanting in early and middle May, ear emergence in early August and maturity in late September belong to medium-mature varieties. The rice blast resistance, bacterial blight resistance, light sheath blight resistance, drought resistance and lodging resistance were identified by the joint disease resistance of some units in Shandong Province and China Rice Research Institute. According to the analysis by the Quality Supervision and Inspection Center of Rice and its Products of the Ministry of Agriculture, the brown rice rate is 82.5%, the milled rice rate is 74.5%, the head milled rice rate is 72.7%, the grain length/width ratio is 1.7, the chalkiness rate is 4%, the chalkiness degree is 0.5%, the transparency is 1 grade, the alkali elimination value is 7.0 grade, the gel consistency is 72mm, the amylose is 15.7%, and the nine indexes all reach the first grade high quality rice standard issued by the Ministry.

Yield performance: In 1998, the average yield was 635.7 kg/mu, which was 12.0% higher than that of Tiejing 4. In 1999, the average yield was 604.5kg/mu, 9.5% higher than that of Tiejing 4. The average yield of variety comparison test in 1998~1999 was 620.1 kg/mu, which was 10.8% higher than that of control Tiejing 4. In the regional test in 2000, the average yield was 575.9/mu, 8.9% higher than that of Tiejing 4, ranking second in yield. The average yield of Liaojing 207 was 633.6 kg/mu in 2001, which was 8.5% higher than that of Liaojing 207. The average yield of the two-year regional trial was 604.8 kg/mu, which was 8.7% higher than that of the control, ranking first. In 2001, the average yield of rice was 647.1kg/mu, which was 7.7% higher than that of Liaojing 207 (average yield 600.9kg/mu).

Suitable areas: according to the results of provincial trial, production appraisal and large-scale demonstration trial in liaoning province, it can be planted in shenyang, tieling, kaiyuan, liaoyang, jinzhou and other places, and also in some rice areas such as beijing, tianjin, ningxia, ** and jilin.

Cultivation points:

1. Sowing sparsely and raising strong seedlings: seeds are strictly disinfected to prevent the occurrence of bakanae disease. Generally, sowing is carried out in early April, with a sowing rate of 150~200g per square meter. The seedlings are ventilated and refined in due time to increase the number of strong seedlings with tillers.

2. Reasonable sparse planting: row spacing 30cm ×13.3cm or 30cm ×16.5cm, 3~4 seedlings per hole.

3. Scientific fertilization: the stem of this strain is thick, and it is more resistant to fertilizer and lodging. The formula of nitrogen, phosphorus, potassium, silicon and zinc is applied. The standard nitrogen and ammonium fertilizer is 60~65kg per mu in the whole life of rice. The base fertilizer is applied first. Generally, the ammonium sulfate is 20kg, the diammonium is 10kg, or the calcium superphosphate is 50kg, the potassium fertilizer is 7~8kg, and the zinc fertilizer is 1~ 1.5 kg per mu. Fertilization principle is heavy before and light after. In the early stage, more fertilizer should be applied to promote tillering. In the later stage, fertilizer should be applied according to rice growth, soil fertility and climate conditions to prevent the occurrence of rice false smut and panicle neck blast.

4. Water management: shallow irrigation is the main irrigation, proper sunning at the end of tillering, shallow, wet and dry intermittent irrigation is the main irrigation after heading. Do not cut off water too early in the later stage of rice growth to prevent premature aging.

5. Pest control: late June to early July, with rice Fengling or insecticide frost control Chilo suppressalis. 7~10 days before heading, ammonium copper complex or DT fungicides had better control effect on rice false smut. To control rice blast, 40% Fuji No. 1 75~ 100g can be sprayed on 40~ 50kg water per mu, 3~4 days before heading, and several times in areas with severe disease.