Recently, a friend of the vegetable farmer called this newspaper to report that the quality of tomatoes in the over-summer greenhouse is not high, either green shoulders or painted faces. On this issue, the reporter interviewed Professor Ren Xiaolin from the College of Horticulture, Northwest A&F University. Ren Xiaolin told reporters that the main reason for this phenomenon is caused by poor flower bud differentiation and uneven nutrition distribution. Since the flower bud differentiation period has been missed, it can only strengthen the management of the flowering and fruiting period. At this time, if the temperature is too high or the humidity is too high, it will affect the normal pollination and fertilization of the tomatoes, resulting in poor flowering results; if the plants are prosperous, and the nutrients supply is low, the flowering results will also be poor. Ren Xiaolin suggested that friends of vegetable farmers should abide by the "four-character formula" and take the following measures to preserve flowers and fruits to ensure the continuous ability of the plants and the commerciality of the fruits.
First, pay attention to a "no" word. That is, the first flower of each spike does not point. Because the first flower of each ear of flowers generally blooms 1 to 2 days earlier than other flowers, ordering the first flower will concentrate the supply of the nutrients to the fruit, reducing the nutrient supply of other flowers and fruits, and thus easily causing different fruit sizes Situation. At the same time, the fruit formed by the first flower also often forms deformed fruit due to sufficient nutrient supply, so the first flower of each spike is not necessary.
Second, seize the word "many". More flowers. After the first flower of each ear opens, there will be 3 to 4 flowers growing together later. To prevent the hollow fruit of tomatoes, flowers should be spotted before the flowers bloom. Two to three days after the first flowering of each spike, 4 to 5 flowers will appear in the future, and it is also necessary to order flowers at this time. It is better to have 8 flowers per ear to facilitate the selection and retention of fine fruit in the next step.
Third, remember a "less" word. That is, leave less fruit and leave fine fruit. After the young fruit sits, select 4 to 6 fruits of the same size, similar fruit shape, and free from pests and diseases, and then remove the remaining fruits.
Finally, beware of the word "bao". That is to preserve fruit is very important. After the tomatoes enter the fruiting period, chlorothalonil, zhongshengmycin, etc. should be sprayed in time to prevent early blight, late blight, bacterial ulcer and other diseases that damage fruits.
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