How to Prevent Peach Blossoming
Recently, Guonongma, Majiahe Township, Yan'an City, Shaanxi Province telephoned this newspaper and said that last year his peach tree in the orchard had died. He had planted an apricot tree in April this year. But today, this apricot tree grows longer than a day. It looks like it will die again. Really do not know what to do? The reporter consulted Zhang Zhicheng, a member of the Expert Advisory Group of the newspaper and the fruit specialist of Northwest Agriculture and Forestry University. According to Zhang Zhicheng's analysis, this is what we often hear about the peach tree disease. It refers to the saplings that appear when peaches, plums, apricots, cherries and other trees of the same type are planted on peach plots. Weak growth, even dead trees. For the disease, Zhang Zhicheng said that there are currently no good therapeutic drugs, but it can be avoided from the following aspects: First, the rotation. The orchards of the former peach trees were instead planted with pears, apple trees, etc., but no longer included the above-mentioned several kinds of stone fruit trees of the same type as peaches, or they were planted with crops for 3 to 5 years, and then planted fruit trees. Second, when the orchard is planned, the newly planted saplings will try to avoid old trees. Because the old tree caves are near the concentrated distribution area of ​​the old tree roots, nutrients in the soil are absorbed and utilized, and there are also many residual substances in the soil that are not conducive to the growth of peach trees or harmful substances that are secreted by the old tree roots. Therefore, in this Replanting the same crop at the location is most susceptible to the disease. Third, change the soil in the tree pit or disinfect the soil. In the old tree caves, deep plowing is carried out, old soil is dug up and removed, new soil is filled in, and then fruit trees are planted. When disinfecting the soil, the soil can be covered with a mulching film at noon during sunny and dry summer months to increase the soil temperature to more than 50° C., thereby achieving the purpose of heat sterilization. The sterilizer solution such as formaldehyde water can also be sprayed to disinfect the heavy earth. Fourth, increase organic fertilizer. In recent years, some fruit growers do not apply organic fertilizer in orchards, or organic fertilizers are rarely used. Only a single application of nitrogen, phosphorus, and potassium fertilizers, the trace elements in the soil are not supplemented, not only the nutritional imbalance, but also makes the soil compaction , Fertilizer and fertilizer supply capacity deteriorated. Therefore, emphasis should be placed on improving the soil, increasing farmyard manure, improving soil fertility, and making the soil water, fertilizer, gas, heat and other factors coordinated and unified, and creating an excellent environment with suitable temperature and humidity and adequate nutrients for the growth of fruit trees.
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test using mixer 》 JG244-2009 construction industry
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Twin Shaft Mixer Main technical and performance parameters:
1, mixing blade operating radius: 204mm;
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2, stirring blade speed: outward 55 ± 1r / min;
3, stirring the rated capacity: (output) 60L;
4, stirring motor voltage / power: 380V / 3000W;
5, the frequency: 50HZ ± 0.5HZ;
6, discharge motor voltage / power: 380V / 750W;
7, stirring the largest aggregate size: 40mm;
8, mixing capacity: under normal use conditions, within 60 seconds the amount of concrete mixture will stir into a homogeneous concrete.
