Shennong 7 is a new soybean variety selected and bred by Shenyang Agricultural University. It was approved in 2002. Since the introduction of the city in 1999, it has demonstrated the advantages of high yield, stable production, resistance to disease, and lodging under different climatic conditions. The average yield increased by 17.8% to 18.9% compared with the control. Through trials and demonstrations, we have summarized Shennong 7's high-yield cultivation techniques and promoted large-scale production in production, achieving significant economic benefits. 1. Main characteristic characteristics Shennong 7 has a average growth period of 131 days and belongs to mid-late-maturing varieties. It has sub-contracted habits with a height of 110 to 120 cm, stout stalks, a number of main stem sections of 24, and 1 to 2 branches. , The plant type converged, the pupa distributed evenly, the leaves were round, hairy gray, and the photosynthetic performance of the leaves was good. In the Dalian region, the flowering period from July 10 to July 15, the final flowering period from August 10 to August 15, the flowering period of about 30 days, the flowering is concentrated; the rate of scabs is high, the average number of plants per plant is 51, and the highest one is 144 310 tablets. Strong resistance to stress, resistance to barrenness, high resistance to soybean virus disease, brown granules, purple granules and downy granules were lower. The grain quality is good, with a protein content of 42.38% and a crude fat content of 18.74%. Grain yellow, brown umbilicus, kernel weight 22.3 g, grain neat, finished grain rate 94%, brown field grain rate 0.3%, purple grain rate 0.4%. 2. Cultivation techniques Before the harvest, immediately after the harvest, turn to the autumn, the spring should be early top mud ridging, Mushi high-quality fertilizer 2000 ~ 2500 kg, fertilizer 10 kg of ammonium phosphate, potassium sulfate 7.5 kg or ternary compound fertilizer (nitrogen, Phosphorus and potassium active ingredients (15% each) 10 kg, or 40 kg of soy special fertilizer, the use of nitrate nitrogen fertilizer is prohibited. Seed pests, moldy grains and impurities are removed before sowing; 2 to 3 times of sowing are conducted 10 to 15 days before sowing, and seed coating is performed after the sun is applied. 46% soybean seedling agent or soybean seed coating agent can be used to control underground pests. Wait. Sowing may be appropriate later. The best sowing date in Dalian is from May 10 to May 15. General sowing rate of about 3.5 kilograms, equidistant hole sowing, 2 to 3 per hole, 3 to 5 centimeters of cover soil, 10,000 acres of Miao seedlings, that is spaced 57 cm, 23 cm from the hole, leaving 2 seedlings per hole. Before the complete development of the two true leaves to the first leaf and the third leaves, conduct the seedlings according to the required spacing or spacing, and remove the weak diseased seedlings to achieve a fixed seedling. When the cotyledon is visibly soiled, mechanical ripping or hoeing is performed once, and 2-3 cm of soil is placed on the seedlings. Then, as soon as possible according to the growth of soybeans and weeds in the field, the shovel will be shoveled. 3 shovels and 3 bolts will be completed before the ridges are closed. The interval time is 10 to 15 days. Chemical weeding before sowing, mu with 39% marmite 200g or 20% tamaronsol 4g acetochlor 150g, 50 kg of water closed weeding; stem and leaf treatment can be in the weeds 3 to 5 leaf stage each Mu with fine quizaloxine or Jingke grass can 60 ~ 80 ml or high-efficient Gai to 30 ml, spray 20 to 30 kg of stems and leaves of water, and increase the dosage and the amount of water as the grass age increases. Virus Disease Prevention Before the emergence of the winged aphid in the three compound leaves of the plant, the diseased plant should be removed in time to prevent spread. In the initial stage of locust (Wanzi honey period), 40% Dimethoate EC 50 ml and 10 kg fine sand are mixed to form a poisonous sand, which can also be used in 10% imidacloprid 2000 times or 2.0% lanthanum spray. In mid-August, the adults of soybean borer insects spend 50 centimeters of straw per acre per acre in the bean field, and soaked in 80% of dichlorvos for 3 minutes to make a poison stick. Every 5 ridges are inserted and inserted every 5 meters. Trapping. Found that dodder should be removed in time to bury the field outside to prevent spread. 3. Experiments and demonstrations In 2003, we planted Shennong No. 7 soybeans in Pulandian, Wafangdian, and Zhuanghe, respectively. The Pulandian demonstration site planted 100 mu, with an average yield of 244.5 kg per mu; Wafangdian City. The urban nurseries in Fuzhou are planted with 10 acres and the average yield is 235.6 kilograms; the Dengsha River in Jinzhou District is planted with 50 acres and the average yield is 238.7 kilograms. In 2004, Pulandian City promoted Shennong No. 7 soybean in 20 towns and villages to a total area of ​​5,000 mu. It was planted on flat land, thin land, mountain roots, and paddy fields, basically representing the region. Various soil types and farming levels. It is estimated that the production is basically more than 200 kilograms per mu, and most of the land is about 225 kilograms per mu.
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