Core Tip: Greenhouse tomatoes have high requirements for colonization, not only technically scientific, but also very critical in management. How to make tomatoes grow "fine" in the greenhouse? How to avoid dead seedlings, rot and other pests and diseases? In the whole, we need to achieve “the combination of species and managementâ€. In this issue, we will explain the key issues before and after the colonization of tomatoes in greenhouses in order to draw reference from them. Trick one: tomato colonization technology "cheats" Pre-plant preparation of tomato early spring production, in addition to new greenhouses, there are generally front-row vegetables, soil preparation before cleaning the pasture. Fertilization is generally applied to mature farmyard fertilizers, with about 50 kg of superphosphate. At the same time, the land can be ridged or ridged, and the ridges are generally 50 centimeters apart and 15 centimeters high. The sorghum is generally made to have a width of 1 meter at the bottom, a width of 70 to 80 centimeters, and a height of 15 centimeters. After the preparation, the mulch is covered. The sorghum mulch film generally opens a small ditch in the middle of the sagger, and is used for irrigation of the ditch under the membrane. Colonization parameters for colonization generally require that the ground temperature in the greenhouse be stable, and the colonization density of early-maturing varieties should be set at 40 to 50 centimeters for row spacing, and 40 to 30 centimeters for planting at 3000~3500 seedlings. The medium-maturing varieties were planted with ridges, and each ridge was planted with 1 row. The density of planting was about 2,500. It should be noted that the water should be poured when the plants are planted, and the plastic film should be sealed after water infiltration. Trick two: management after planting Temperature Light In spring when the weather is fine, the greenhouse can maintain a high temperature, so there is no need to open the heating system. However, in cloudy and rainy weather, the shed needs to be warmed (the temperature is set at 16°C, which is 4°C lower than that at night during sunny days). Humidity management greenhouse relative humidity should be controlled at 70% to 80%. When the outdoor humidity is high or the temperature is too low, the heating system must be turned on to allow the air to flow and create a suitable humidity environment. At the same time, ventilation should be maintained to prevent the occurrence of diseases. Fertilizer management Water quality should be selected when watering to prevent the growth of algae and drip irrigation pipes. After planting, water well to ensure that the substrate is moist and ensure that the plants do not wilt. At the same time, it is necessary to top-dress fertilizers in conjunction with watering. The honeybee pollinates the bees into the shed to ensure that the plants can evenly pollinate, thereby reducing the generation of abnormal shaped and inferior fruits. Trick 3: Ways to eliminate diseases and pests First of all, in the production of tomatoes in a multi-span greenhouse, it is easy to breed root-knot nematodes and it is devastating. Therefore, it is necessary to ensure that the temperature and relative humidity in the booth are within a reasonable range. In addition, the pest source and its growing environment must be eliminated. Secondly, the diseases of tomato in spring usually occur in 3-6 months, such as early blight, gray mold, leaf mold, late blight, etc. can seriously harm the tomato. Prevention and control methods: Strictly do a good job in disinfection of frame, drip irrigation system, heating system, cultivation matrix, and other related instruments in greenhouses, timely remove weeds, diseases and pests and residues of leaves in greenhouses, and strengthen field inspections and observations in cultivation. Pests and pests are detected and controlled. Short range distance sensors from JRT combine highly precise measurement results with quick and reliable response. Short distance sensor module use single-transmit and single-receive measurement technology and can be used to measure a distance or monitor the slow moving objects. For the laser pointer distance measure, also called optical range sensor, can measure legth, width, depth. Laser rangefinder transducer with rxtx has been widely used to industries. Laser Distance Sensor Short Range,Short Range Sensors,Oem Laser Distance Sensor,Distance Sensor Laser Chengdu JRT Meter Technology Co., Ltd , https://www.rangingsensor.com
Colonization of tomato colonies should be scientifically "customized"