Pteris is a thermophilic plant, which reproduces asexually with tillers and ramets. It is suitable for growth at a temperature of 10-25°C. It is not tolerant of cold and high temperature and drought. The frost-free period in cultivated areas needs to be more than 150 days. After the frost, the leaves will die and dormancy. The ability to withstand low temperatures of -10°C. The frost-free period in northern China is short, and the single-season quail is mainly planted. The single-season quail is suitable for spring borne. Southern frost-free period is long, single-season pods and double-season pods are suitable for planting. Clam white is a crop that is not resistant to continuous cropping, and rotation plays a very important role in the production of Clam. In some localities, the introduction of white rice was high in the first two or three years and it was listed early. However, the output decreased year after year. The listing period was also postponed, and the pupa became smaller and the quality was declining. Apart from the problems with seed selection, the farming system was also One of the main factors. First, the type of rotation The rotation of Pak Pak Tin has the same crop rotation and paddy crop rotation in paddy fields. Paddy field rotations are mainly crop rotations with rice, mat grass, leeches, earthworms, arrowheads and other crops. Indica rice and rice rotation, white glutinous rice with double-season glutinous varieties, Xia yin cultivation after cultivating cultivation, full base fertilizer, planting single-season rice or even late rice, the two complementary reproductive periods, can obtain high yield. After the white and mat grass wheels were harvested in single-season or double-season white-oak and autumn harvest, soil preparation, fertilization and planting of mat grasses were conducted. The flood and dry rotations in Baitian are mainly crop rotations with dry fruits, vegetables and fruits. The main ones are: Qiuyu, Xiayu, Xiaqiu, cabbage, solanaceous, wintering, shed, autumn, autumn, summer, summer, cabbage, or radish. Vegetables? Spring eggplant fruit? Autumn èŒ autumn èŒ summer èŒ ç§‹ autumn fruit, winter vegetables, autumn èŒ and so on. These rotations were all seasons of autumn, after the summer, they planted dryland vegetables. Rotation of paddy-upland can effectively improve the physical and chemical properties of soil, and it is the best way to solve the continuous crop failure factors. Farmers in Huangyan, Zhejiang Province, also used a sorghum-sweeping planting method to grow white plants. That is, planting sorghum in the same field and transplanting the sorghum planted in the field in the previous year to sorghum. In the meantime, Pak Tin's falcon became a ditch. This method also has a certain effect on rotation, and it has a certain effect on overcoming continuous obstacles. In this way, in combination with other fertilizer and water management measures, in the past few years, some blocks in Huangyan have been continuously planted. In addition, there is no obvious reduction in yield and the quality does not decrease. Second, crop rotation mechanism Some tenants have insufficient understanding of the role of Pak Pak, and they often take many years of continuous cropping. Some even transplant for a few years, seriously affecting the yield and quality of Pak. According to the survey, Qinbai is continuously producing more than two production cycles, and the output of each cycle is reduced by 10-15%. The reasons for the increased yield of the paddy-upland rotation are as follows: 1. Physical and chemical properties of the soil can be significantly improved, in particular, the bulk density of the soil can be reduced, the aeration and water permeability of the soil can be increased, the effect of improving the soil aggregate structure can be significant, and the release of soil nutrients and the nutrient of the crop can be achieved. Absorption and utilization have a very good effect. 2, can reduce crop diseases. After continuous cropping, the sheath blight and leaf spot of flax increased significantly. The longer the continuous work, the heavier the disease. After drought and rotation, the incidence was significantly reduced. 3, can improve fertilizer utilization. In the continuous soil, the phosphorus and potassium consumption is large, and nitrogen cannot fully function. After the flood and drought rotation, it can make full use of the land and increase the utilization of fertilizer. 4, can reduce field weeds. Changes in the ecological environment of floods and droughts are not conducive to the continuous growth of the same type of weeds and can significantly reduce the damage of weeds. Inter-planting and three-dimensional planting mode In addition to crop rotation, the cultivation of Pak Pak can also be interplanted. The crops in the rice fields of Pak Pak Tin mainly include rice, rhizomes, coriander, and water leeks. Of course, they can also be interplanted with wheat, rape or dryland vegetables. The interplanting method can be used for interplanting or interplanting multiple lines, and it can also be used for interplanting around the middle of the block. The use of intercropping of alfalfa in Baitian can effectively increase land utilization, improve the ventilation and translucency between plants, reduce the water temperature in Putian, make it easier to make it earlier, and reduce intercropping weeds in Putian. In order to further increase the utilization rate and output rate of the alfalfa field, in recent years there have also been three-dimensional ecological farming modes of symbiotic co-breeding of the albacore with white fish, green prawns, scutellaria, crabs, and ducks, all of which have achieved good results. Frequency Induction Heater ,High Frequency Induction Heating,Induction Heating Aluminum Frequency,Low Frequency Induction Heater Dongguan Jinwang Ultrasonic Equipment Co.,Ltd , https://www.jwultrasonic.com