Â Tomatoes have the characteristics of water, large water demand and strong drought tolerance. According to the relevant practical experience, the watering techniques of greenhouse tomatoes are as follows:
Â Watering must be carried out according to the characteristics of different growth periods.
Â Under normal circumstances, the tomatoes are planted while watering, and after pouring the water for 3 to 5 days, the seedling water is poured again, until the first ear is sitting, such as the size of the egg yolk, and then poured again. As a result, the early planting was small, the leaf transpiration was small, the number of fruits was small, and the ventilation was small. Generally, water was poured in 7-10 days (the water volume was small). Later, with the growth and development of the plant, the number of fruits increased, the ventilation increased, and the transpiration increased. The number of days between watering and the amount of watering should be shortened, and the soil should be dry and wet (mainly wet), harvested. The soil should be kept moist to increase the weight of the single fruit.
Â First, watering according to the characteristics of the time.
Â Overwintering tomatoes cultivated in winter-heated greenhouses, in addition to pouring water and timely cultivating and cultivating in the planting period, generally do not need to be watered after sitting in the first panicle, and can be covered with mulch to keep moisturizing after pouring water. Then carry out a small water under the membrane to avoid lowering the ground temperature. After the weather warms up, increase the amount of water to meet the growth and development of the fruit. The greenhouse tomatoes cultivated in early spring should be watered in time to meet the water demand.
Â Second, watering according to the growth.
Â The plant is dark green, the leaves are shiny, green and flat, and the heart leaves are stretched, which is an even and appropriate expression of moisture. If the heart leaves are not shrinking, the leaves are dark green, and the mild leaves are drooping on sunny days. If the heart leaves are over-expanded, the leaves are large and thin, and the leaves are spit with too much water. It is a manifestation of excessive water, and should be controlled by water.
Â Third, the watering time of the day in the greenhouse.
Â During the growth period, you should choose sunny watering in the morning. After watering, it should be ventilated and drained. It is not suitable to water in the afternoon, evening or rainy days. Otherwise, the humidity in the shed will be too large, causing downy mildew and other diseases. It is not suitable for watering at noon. In order to avoid the high temperature watering affecting the physiological functions of the root system; the weather is hot in the middle and late stages, and the greenhouse can be ventilated day and night. Water should be given in the morning and evening to cool down.
Â Fourth, watering during the fruit picking period.
Â Tomatoes should be watered before harvesting, which increases the value of the fruit.
Pyrite as Fillers Used in Grinding Wheels/ Abrasive Tools
Ablation grinding wheel / abrasive( filling agent )
PYRITE__As fillers used in grinding wheels/ abrasive tools
Place of Origin: Henan Luoyang, China
Detailed introduction: is filling agent for ablating grinding wheel abrasive, which can effectively reduce the grinding wheel temperature during ablation, improve the heat resistance, and prolong the service life of the grinding wheel.
Formation of a protective layer
(1)The reaction absorbing oxygen occurs between 400 and 475 degrees, thereby reducing the oxidation of resin, reducing the oxidation burn of workpieces, and prolonging the working life of grinding wheels at high temperature.
4 FeS2 + 11 O2â†’2 Fe2O3 + 8 SO2
(2) 4 FeS + 7 O2â†’4 Fe2O3 + 4 SO2
400-475 degrees is a limit that the grinding wheel can easily reach. The above reaction creates an oxygen-free and hypoxic environment for the grinding wheel at the micro level, thereby improving the high-temperature performance of the grinding wheel.
Decomposition reaction occurs at 650-degree heat absorption, thereby reducing the working temperature of the grinding wheels.
FeS2â†’FeS + S
(3) It enters the melting state at about 1100 degrees, which becomes a good lubricant to protect the grinding wheel FeS(s)â†’FeS(l).
(4)Sulfur, sulfur dioxide and sulfur trioxide react with the workpiece surface to form FexSy:
S: 48%min, FE: 42%min, SIO2: 3.0%max, PB: 0.1%max,
ZN: 0.1%max, AS: 0.1%max, . C: 0.3%max, CU: 0.2%max,
H20: 1.0%max, SIZE: 95%min
Granularity: (0-3)mm/(3-8)mm/(3-15)mm/(15-50)mm or other particle size.
Packing: 25KG/500KG/1000KG/BAG or 1000KG/BAG or other packaging.
Note: if there are special requirements, the product can be customized according to clients` requirements.
Iron Sulphide For Resin Grinding Wheel---LHT(SL)
Iron sulphide for resin grinding wheel Pyrite, Iron pyrites, pyrites lump, Ferro sulphur, Pyrites powder
LUOYANG PERFECT TRADING CO.LTD, , https://www.pyritefes.com