How to grasp the amount of vegetables to leaf
In the work of leaf removal from vegetables, it is necessary to grasp the principle that less plants should be left in the early stages, and mature plants can be properly removed from the leaves, and three types of errors should be avoided.
Vegetable seedlings and colonization should be followed by the increase in the number of leaves, the removal of a very few aging leaves. If you blindly go to the leaf at this stage, it will cause slow growth of the plant and delay the root system. However, in the process of topping, smashing and pruning, removing some leaves is essential.
First, to stay less to stay more
Disadvantages of removing a large number of leaves at one time are many, in addition to causing roots and growth problems, it also causes sunburn spots, deformed fruit, and rolling leaves. As the leaves are removed, the fruit is suddenly exposed to direct sunlight, and the fruit will have sunburn spots. After the leaves are removed, the ratio of leaves to leaves is small, and the photosynthetic nutrient supply is insufficient. Often, it will form a stale fruit, a hollow fruit, and a sharp tip; the removal of leaves will cause plants to grow. Unbalanced growth from top to bottom, the evaporation of water suddenly becomes smaller, often causing serious curling in tomatoes. Therefore, the purpose of deforestation should be clear, the quantity should be appropriate, and if it can not go, it should not go too early. Except for onions and amaranth before planting, the leaves must not be cut in a proper way. The deforestation should not be taken as a necessary cultivation measure for vegetables.
Second, adult plants can be properly removed
Sometimes, in order to re-accelerate growth, mature plants can be properly removed. For cucumber headless plants, in addition to the application of boron fertilizer, some large leaves can be removed to promote germination. Because headlessness is the main contradiction at this time, the purpose of deforestation is to sacrifice and sacrifice a few leaves worth. After a bean pod has passed a batch of pods, 1/4 of the old leaves can be removed to promote more new shoots. New shoots can be produced to create a new batch of flowers and a new batch of pods can be formed. These leaves are worth too much. . The cucumber in the greenhouse needs to be covered once in a while, and the lower leaves are generally piled on the ground. However, if too many piles are unfavorable, the lower leaves need to be removed to prevent diseases. Peppers and sweet peppers can also be removed from the leaves (sides below the stem) and lateral buds when the plants have grown. However, it is not advisable to remove it too early. Some vegetable farmers remove all the lateral shoots and leaves at the same time when the capsicum diameter of the pepper plants has not reached 20 centimeters, which is obviously unfavorable for growth and development.
There are several misunderstandings in deforestation of vegetable production:
1. It is thought that removing some old leaves from the lower part can save nutrients. In fact, as long as the leaves do not become very yellow, the photosynthetic product it produces is much greater than the consumption. The leaves of the melon and the lower part of the fruit mainly provide nutrients to the root, and generally have the function of raising the root; the leaves of the upper part of the melon and the fruit mainly provide nutrients for the growth of the melon and the fruit. Therefore, proper preservation of some leaves of the melon and the lower part of the fruit can play a role in raising roots, strong trees, and preventing premature plant failure. It is a good way to prolong the harvest period and increase the yield. It is a pity to remove it prematurely.
2. It is believed that more leaves will make the solanaceous fruit color better. In many parts of the country, when the tomato's lower fruit just began to color, the leaves below the 3 spikes went to a clean light. Some fruit in the middle of ripening, the leaves under the ears to the light, leaving only 3 leaves above the ear, which is obviously wrong. With three leaves, it is difficult to supply more than 20 nutrients needed for fruit growth. Even if the fruit color is better, there will be too few leaves and insufficient photosynthetic products, which will cause slow fruit growth, increase in dead fruit and more hollow fruit. The loss of production is very large, which is why the sesame leaked watermelon.
When the upper fruit of the tomato is nearly mature, it is only necessary to remove the individual leaves that are close to the fruit or remove some of the leaves that cover the fruit, and it is not necessary to remove a large number of leaves for coloring. Because the main reason for the poor coloration of fruits is the temperature is too high or too low (daytime temperature is higher than 35°C or lower than 15°C), leaf shading effect has an effect on coloration, but it is not a critical issue.
3, that the removal of leaves can reduce pest damage. Diseases and pests should mainly be controlled by changing the environment, increasing the resistance of varieties, and spraying pesticides. Although removal of leaves can remove some of the diseases and eggs parasitic on the leaves, it cannot be removed. It is not advisable to reduce pests and diseases at the expense of leaf removal. Sometimes the damage to the leaves will be greater than the damage to some pests. The wilting of leaves caused by root diseases sometimes removes some of the leaves at the beginning to make the plants no longer wilt, or to make the degree of wilting lower, but the root diseases will not become lighter. This kind of change that is no longer wilting is temporary. It is usually thirst for drinking. It is mostly to speed up the death of the plant and never to use leaves to prevent root diseases. The leaves are the plants for photosynthesis of vegetables, leaving leaves and leaves to be rational, taking into account the advantages and disadvantages.
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