Cultivation techniques of deep pine and narrow row parallel sowing and dense planting of soybean

Deep loosening, narrow row, flat sowing and close planting of soybean is a new high yield cultivation model after "three ridges" and "big ridge and close planting". It integrates advanced technologies such as deep loosening and rotary tillage, keeps secret with fertilizer, increases yield with density, increases crown leaf area index, improves light interception rate, and realizes cost saving and efficiency improvement of soybean production. In the past two years, Luobei County has popularized planting 16000 mu in Tuanjie, Fengxiang, Zhaoxing and Taipinggou, with an average yield of 206 kg per mu, 43% higher than that of the control. Its main cultivation techniques are as follows.

1. Stubble selection and soil preparation

Select@#@245 @#crop, corn crop and one-year soybean crop, plough deep layer, flat land with medium fertility, subsoiling depth 35~40cm, rotary tillage depth 12~15cm, rake fine and level for sowing.

2. Variety selection and seed treatment

Dwarf or semi-dwarf varieties with strong stalk, lodging resistance, fertilizer preference, density tolerance, high yield and good quality, strong stress resistance and suitable maturity are selected. At present, the main varieties are Hefeng 42, Hongfeng 11, 97~04, Heihe 25, etc. Before sowing, seed selection should be carried out, the purity should reach more than 98%, the germination rate should be more than 95%, and soybean seed coating should be selected. Fertilization: 1000 kg of high-quality agricultural fertilizer shall be applied per mu where conditions permit, 15 kg of diammonium fertilizer, 7.5 kg of urea and 5 kg of potassium fertilizer shall be applied per mu.

III. Sowing method, sowing date and density

Ylang Ylang precision seeding machine 2BT-3 was used. It was suspended by a small four-wheel tractor. The working width was 130cm, the ridge was large, 6 rows were sown on the ridge, the double strip width was 12cm, the small ridge distance was 22cm, the large ridge distance was 50cm, and the sowing depth was 3- 5 cm. The seeds were sown from May 5 to 20. Sow and suppress. 23,000 - 30,000 seedlings per mu.

IV. Chemical weeding

① Closed weeding before seedling after tracing.

Mu 72% Dool 130ml +48% Clomyl 50ml +70% Methazine 20g mixed with water 500kg spray

Fog or mu with 43% bean B mixture 250 ml mixed with water 500 kg spray.

(2) Stem and leaf treatment can be selected for some plots with poor sealing effect.

Mu with 12.5% to clean 100 ml plus 25% tiger Wei 66 ml water 450 kg spray.

V. Field management

① According to the forecast of insect situation and the incidence of disease in the field, the fruit borer and gray spot disease should be controlled in time.

(2) Spraying Huimanfeng foliar fertilizer before and after flowering to promote ripening, improve quality and high yield.