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Diagnose root fertilization and nutrition
Plants lack a certain kind of nutrient elements and are likely to cause deficiency of the disease. For such diseases, people must first understand the real cause of the disease, and then they can fertilize the “fatigue under symptomatic conditions†so as to achieve the goal of “fertilization to disease eliminationâ€. However, the symptoms of this physiological disease of plants are not easily distinguishable. Sensitively, it is difficult to identify and determine what fat the plant lacks. In order to diagnose the disease of the plant, the best way is to conduct nutrient diagnosis, such as using the juice from the leaves of the plants, to carry out a rapid chemical test, but it requires equipment and medicines. It is still difficult to do in rural areas. How do we do it? Root fertilizer can help us solve this problem. The approach is very simple, that is, to select plants from plants that are suffering from a deficiency, and to spray or inject fertilizers that the plant may lack at each point. After a period of observation, the point deficiency syndrome disappeared, and the fertilizer at that point was not what the plant lacked. For example, there are - blocks of corn, lacking green yellow, through the observation and analysis, preliminary thought may be nitrogen deficiency or zinc, iron, manganese. In this way, we can select four points in the corn field, each selecting 5 to 10 corns, and spraying 15% urea solution at the first point. The second point sprayed 0.3% zinc sulfate solution, the third point sprayed O.5% ferrous sulfate solution, and the fourth point sprayed O.1% manganese sulfate solution. After a few days, if the pathological condition at the second point disappears, and the symptoms of chlorosis at the first, third, and fourth points still exist, it can be assumed that the corn is deficient in zinc so that it can be sprayed with 0.3% zinc sulfate solution throughout the field to make corn. regain health". Another example is that there are - apple trees, yellow leaves, may be lack of nitrogen or zinc, iron but can not be diagnosed. Three optional points. Three apple trees were selected for each point, and a hole was made in the 9 trees with a knife to the xylem. The injection needle was inserted into the hole and the needle passed through the hose. Connected to the bottle containing fertilizer solution, the bottle is tied to the trunk above the injection site, using the siphon principle, in the first point injection of 1.5% urea solution, the second point of injection of 0.2% zinc sulfate solution, the third The point of injection of 0.75% ferrous sulfate solution, observed after 10 days, if one or two points of the disease is still the same, and the third point of the fruit tree exposed green new leaves, the disease began to disappear, which can determine the fruit tree iron deficiency, and then, using injection or The method of spraying, in the entire Lin Shigang O.75% ferrous sulfate solution, it does not take long, fruit trees that are vigorous, "rejuvenate."