Key techniques for narrow-row and dense planting of soybean

Soybean cultivation with narrow rows and dense plants is an advanced cultivation technology with a large area of ​​soybean cultivation and rapid development in the world. Heilongjiang Province started from the early 1990s and was identified as a key research project of the provincial party committee in 1995.

First, choose the appropriate variety, do a good job in seed treatment

Narrow rows and dense plants must be resistant to lodging and have a large potential for dwarf and semi-dwarf varieties. At present, more suitable varieties for production are Hefeng 25, Hefeng 35, Funong 14, Beifeng 14, Beifeng 11, Hongfeng 11, Heihe 22 and so on.

The seed must be sowed prior to sowing. Somatic selection machines or artificial grain selection shall be used to remove diseased spotted particles, insect-feeding grains and impurities, and to reach the seed grading standard or above. Purity of not less than 98%, germination rate of not less than 85% (rate of seedlings), moisture content of not more than 13%. According to the types of pests and soil conditions and soil conditions, seed dressing. The main underground diseases and pests affecting soybean production include cyst nematode, root rot and root rot, and 35% of soybean seed coating agents such as clodford seed coating can be used to control the ratio of drug to seed 1:75 to 100. It can also be treated with 35% ethylthiophosphorus or 35% methylthiophosphoric acid in a seed amount of 0.59. At present, there are many varieties of seed coating agents on the market, and the effects are quite different. The use of these agents is a matter of choice. Soybean root rot can be controlled by using 50% seed mixture with 0.5% seeds or 50% carbendazim seed dressing with 0.3% seeds. The control of soybean cyst nematode can be seed dressing with 2% soybean seed dressing, while also preventing root rot.

Second, the fine soil preparation

Plane narrow planting and dense planting, no deep plowing and deep loose foundation land, unfolding or plowing, deep plowing, plowing depth of 18~20cm, concrete depth 12~15cm, depth of deep soiling more than 25cm, volt , Fall or tumbling down the ground to achieve the state to be broadcast. Deep plowing foundations can be used for autumnal plowing, with depths of 12 to 15 cm, and flat plowing.

Large ridges and narrow rows of dense planting and small ridges and narrow rows of dense planting should be ridiculed on the basis of volcanic ground preparations, volts, autumn ridges, or ridges, deep pine ridges. Large ridges and narrow rows can be used as a machine to form a 90-140cm ridge, the height of 15-18cm, after the ridge compaction, the height of the ridge to the ridge table is 18cm, and the narrow ridges can be used for ordinary ridge plowing. 50cm of small ridges, suppressed after ridging, reaching the state to be broadcast.

Third, increase fertilizer input

The first is to increase agricultural fertilization, the amount of medium-fertilizer plots is 22.5t or more, and the amount of N, P, and K required for chemical fertilizers is increased by 159 or more than that of conventional ridge crops. Conditional fertilization, general medium-fertility plots are available. Per hectare, diammonium phosphate 150 ~ 225kg, potassium sulfate or potassium chloride 60 ~ 75kg, the use of biological potassium fertilizer can not apply potassium fertilizer, but also due to the application of trace element fertilizer. Secondly, fertilizers and chemical fertilizers must be applied deep or in layers. Soybeans use 10 kg of urea and 1.5 kg of potassium dihydrogen phosphate per hectare at the initial flowering stage, and are dissolved in 500 kg of water for spraying. For non-application of micro-fertilizer as a seed fertilizer or no micro-fertilizer seed dressing can be added to micro-fertilizer spraying.

Fourth, sowing

1. Planting methods use clear seed or large proportion of intercropping.

2. Sowing time sowing, when the ground temperature stable through 7 ~ 8 °C when the beginning of planting, the central and southern regions of Heilongjiang Province April 25 ~ May 10, the northern and eastern regions from May 5 to May 15th.

3. 24 rows of seeders can be used to plant the narrow row and dense planting method. One seeding port can be used to block one seeding hole, and a combined seeder produced by JOhnDeer can also be used. For 30cm row spacing, in addition to the above models, a 1.4m precision jukebox on the basis of small four-wheel drive developed by DongNong can also be used.

Large ridges were planted in narrow rows and densely planted on mechanical ridges. The ridges were equidistantly equidistantly planted on three rows of ridges, three ridges and two ridges were ridges with a ridge length of 90 to 105 cm. The ridge rows and four rows of seeders produced by the Helen agricultural machinery repairing plant were used for sowing. Two ridges are ridged and the ridges with 120 to 140 cm ridge spacing are sown with 6 rows of ridges on the ridges of Huafeng 2BKM-IB large-narrow row special planter of Huachuan. 45-50cm ridges can be properly adjusted on the original model, planting 2 rows on the ridge.

4. Density: 330,000 to 380,000 seedlings per hectare in the central and southern regions of Heilongjiang Province and 366 to 460,000 seedlings per hectare in the northern region.

V. Field Management

1. Chemical weeding

First, pre-emergence application of pre-emergence application of 50% B-butylamine EC 2500-3000ml (or 90% Nilais 1560-2200m1) plus 70% Secjin WP 300-600g or plus 40% Guangmianling Emulsifiable oil 800 ~ 1000ml or 75% of Guanglingling powder 15 ~ 25g, or 72% Dole EC 1500 ~ 3000mg per hectare of water spray 200kg of soil.

The second is stem and leaf treatment after soybean emergence, weeds 2 to 4 leaf stage. Use 5% quercetin emulsifiable concentrate 900-1500ml per hectare, or use 15% spermatozoa to stabilize the emulsifiable concentrate 750～100n1, or use 10.89 high-efficiency herbaceous emulsifiable concentrate 450ml, or use 6.9K dilute concentrate 750-900ml, or Use 12.59 to take the fluffing cream of 1250 to 1500ml, and spray 200kg of spray. To control broad-leaved weeds, use 25% of fomesafen 1000-1500ml per hectare, or use 24% of weed fodder 1000-1500ml, and spray 200kg of water.

The third is that in the fall, the temperature is stable below 10°C in the autumn, and the soil moisture is suitable (in the case of non-agglomerated soil). After spraying the land first, spray the pesticide while using a locomotive to pull the disc harrow.耙 耙 耙 耙 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10. Autumn application can effectively control the second spring weeds, the amount of which is 10 to 20% more than spring application. 70% of Dole EC 2500-3500ml/48% of Clenbuterol 800-1000ml or 50% of fast-receiving powder 120-180g/ha, or 90% of Ninets 2200-2500ml plus 50% Speed ​​120 ~ 180g.

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