Strengthening integrated field management should adopt different management measures according to soil fertility, moisture, seedlings (especially the total number of stems per acre) and pre-fertilization in different fields. The basic principle is: weak seedlings to promote the main, Wang Miao to control. Take the management of fertilizer and water in winter wheat in the north as an example: Before the greening, the total number of stems per acre is less than 450,000, and the three types of wheat fields with lighter leaf color and poor growth are poor. Fertilizer and water management should be carried out in time, and spring topdressing can be carried out twice. For the first time in the greening period, 5-8 kg of urea was applied per acre with watering; the second time was 10-15 kg of urea per acre with watering at the jointing stage. Before the greening, the total number of stems per acre is between 45,000 and 600,000, and the second group of small wheat fields is small. In the wheat-up period, combined with watering, 10 to 15 kg of urea per mu. Among them, wheat fields with insufficient wheat seedlings can be topdressed and watered in the early stage of the rise to the middle of the body; suitable wheat fields should be topdressed and watered in the late stage. Before the greening, the total number of stems per acre is between 60,000 and 800,000, and the group is suitable for a kind of wheat field. It can be applied with 12 to 15 kg of urea per acre after watering up to jointing stage. Before the greening, the total stem number per acre is more than 800,000, the color of the leaves is dark green, and the Wangmiao wheat field with a prosperous trend should adopt the cultivating and suppression, reduce the application of nitrogen fertilizer, control the group length, prevent lodging and gluttony and late maturity. Reasonable addition of organic fertilizers The abnormal color of wheat seedlings is related to the lack of long-term application of organic fertilizers to the lack of micronutrients in the soil, or the improper application of organic fertilizers leads to the abnormal growth of seedlings. Winter wheat can be combined with autumn tillage to apply organic fertilizer; spring wheat is planted earlier, without deep tillage conditions, can be combined with land preparation after the autumn harvest in the previous year. In some arid areas, no-till or less-tillage techniques can be combined with regular deep-plow or deep-soil techniques to balance the contradiction between deep-fertilization and non-cultivation of organic fertilizers and soil improvement. Straw returning is another method of applying organic fertilizer and should be strongly promoted. However, there are three kinds of consequences due to improper returning methods: First, the quality of the land is not good or the straw is smashed and buried well, causing the seeds to hang, and the wheat seedlings die or yellow due to lack of proper nutrients and water. Second, the straw returned to the field without applying an appropriate amount of nitrogen fertilizer, resulting in microbes and seedlings competing for nutrients; third, soil drought and water shortage limit the decomposition and fermentation of straw by microorganisms. The following measures should be taken for this: 1. Use the returning machine to smash the straw into a small section of no more than 10 cm, spread it evenly on the ground, and then use a disc harrow or a rotary tiller to rotate the stalk so that the straw is evenly distributed in 0~ In the 10 cm soil layer, improve the quality of land preparation and straw returning; 2. On the basis of normal fertilization of wheat, apply 2 to 4 kg of nitrogen fertilizer per mu to adjust the carbon to nitrogen ratio of straw; 3. Appropriate irrigation before land preparation , regulate soil moisture. Establishing a field archive should also establish a field archive for farms and growers. The content includes local soil, climatic conditions and their changes, crop types, major management measures, product levels, pest and disease occurrence and control measures. These materials (including necessary photos) should be kept in writing for long-term use in written and computer software. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone PCR Reagent For Vetor-borne Diseases PCR,PCR Reagent,Molecular diagnosis,Vetor-borne Diseases Shenzhen Uni-medica Technology Co.,Ltd , https://www.unimedicadevice.com