This year, another 20 or 30 greenhouses have been added to Beihehe Village, Yingli Township, Shouguang City. For peasants who grow greenhouse vegetables for the first year, playing sheds is not an easy task. Although they had previously consulted the experienced vegetable farmers in detail about the management links, they were able to go through actual operations and still had a lot of problems. In response to these problems, the reporter made the following recommendations.
Questions and Suggestions: Base fertilizer does not attach importance to the use of trace elements, and it needs top dressing to supplement it.
In the greenhouse of vegetable farmer Wu Fenqin, the reporter found that the yellow leaves of the lower middle leaves of tomatoes. According to Ms. Wu’s introduction, the leaves were still green at the beginning of tomato colonization, but then there was a trend of gradual chlorosis from bottom to top. During this process, the edges of leaves remained green. However, the infected leaves did not show any obvious invasive disease characteristics such as pyoderma and moldy hair, but only the mesophyll of leaf veins yellowed.
Therefore, the reporter concluded that this is a physiological disease caused by the lack of elements. After asking for details, the reporter pointed out that although the vegetable farmer used organic fertilizer and compound fertilizer for applying base fertilizer, he did not pay attention to the application of trace elements. The newly-built sheds are all excavated sheds. The mature soil on the surface of the planting areas in the sheds has been excavated and built as the back wall of the shed. The underlying raw soil lacks the mineral elements necessary for plant growth. Therefore, the reporter suggested that the new greenhouse must be balanced when fertilizing, and must not only pay attention to the application of organic fertilizer and a large number of elements, regardless of the presence or absence of trace elements. The current remedial measures are: timely spraying foliar fertilizers containing magnesium, iron, zinc and other elements of the full nutrition, the use of foliar fertilizer should pay attention to: the concentration of foliar fertilizer can not exceed 0.5%, do not Strong light is applied for a period of time to prevent burning of the leaves; in addition, when the mandible is planted, 10-20 kg/mu of magnesium sulfate should be added to the base fertilizer, and 3-5 kg/mu of ferrous sulfate added.
Problems and Suggestions II: Serious planting of dead trees is a serious problem. Soil management should be strengthened to improve the rhizosphere environment.
In the shed of vegetable farmer Liu Kuiyuan, the reporter found that there were more dead tomatoes. After carefully inquiring about the situation, the reporter concluded that this was mainly due to Mr. Liu’s usual mismanagement. Master Liu used flat vine cultivation during tomato colonization and adopted flood irrigation to make the roots less breathable. After watering, it even happened to be cloudy. As a result, roots and soil-borne pathogens infested the plants and caused root rot. In addition, in the shed of Master Liu, the reporter also found that some tomato plants showed stem rot, resulting in dead trees.
In view of the above situation, the reporter suggested taking the following two measures. First of all, timely scratching, the tomato root system is relatively strong, and after the soil moisture is reduced by diligence, the root system will gradually recover. Secondly, promptly irrigate the roots to prevent dead trees from continuing to occur. Use 50% of the copper citrate copper wettable powder 500 times solution + 72.2% of the Precible water 800 times solution + 80% of the Gina sea (Fumei Double) 750 times the liquid for root rot prevention and control, use 20% of methyl-rhodoxime EC 1200 times mixed with 5% Jinggangmycin aqueous solution 1500 times Irrigation root treatment of stem rot.
Problems and Suggestions III: In case of excessive planting density, double stalk pruning must not be implemented.
In Beijiaohe Village, the reporter saw that almost all of the new sheds had large planting densities of tomatoes. Under the normal spacing, the cherry tomato spacing was only about 32 cm. Seeing the intensive sling on the wire, the reporter could not help but ask, "What cherry tomatoes do you plan to prune?" said the farmer, "Before we saw other people use double stalks for planting, we also plan to do so. â€
The reporter pointed out that the current line from the factory to see, the density has been larger, in order to avoid strains and strains, branches and branches form a negative situation between the mutual shade, the reporter recommended not to use double stalks pruning, but should use single stalk pruning. Usually when tomatoes are planted, the row spacing is 60-72 cm, and the spacing is 45-50 cm. If cherry tomatoes are to be double-stalked, the plant spacing should be about 50 cm, leaving enough space for rhizosphere development and above-ground growth of each plant, so as to achieve neither impact on tomato yield nor affect fruit quality. It can also save a lot of good results.
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