Cotton vas deferens get twice the result with half the effort at seedling stage

& nbsp & nbsp on May 25, at the invitation of the Guangzong Service Station of the Cotton Committee of the China Agricultural Technology Association, I went to Gaojiazhuang, Fengjiazhai Township, Guangzong to see the cotton fields and discussed the current management technology with the farmers. Guangzong County, adjacent to Weixian County, is a dry zone with less rain and more sand in the central and southern part of Hebei Province, which is very suitable for growing cotton and is one of the key cotton producing counties. At present, the seedling situation is growing well, there are 4 true leaves, and the seedlings are basically disease-free; some near the tree edge are damaged by cotton bug bugs, and a few cotton seedlings have cotton aphids, and the villagers have carried out control. Due to the use of two forms of equal row spacing and large and small rows, the density of cotton field is very different, the density is less than 2000 plants if the equal row spacing is too wide, and the density is as high as 5000 plants if the row spacing is small. Generally speaking, little attention was paid to cotton seedling management, less labor in the field, and most of the cotton fields were in a consolidated state. At present, the most urgent thing is to plough between rows to promote root rooting, and the second is to seal the soil for cotton seedlings to preserve soil moisture and increase temperature. During the discussion with the farmers, combined with the reality of the village, I stressed the importance of ploughing and talked about several management techniques, which the farmers understood and agreed with.

First, the soil moisture in the middle ploughing is better this spring, but due to the recent high temperature, windy and dry days, the soil moisture is seriously lost. Mid-tillage can cut off soil capillaries and prevent further evaporation of water. In the middle and late June, northern China is prone to drought, and soil moisture will be the most scarce resource. Middle ploughing also has the function of promoting root rooting, strengthening root system and preventing diseases. It should be ploughed every time after rain. Mid-tillage has another advantage: when it needs to be watered, there is soil to take when it is used to make beds or open ditches; if there is a piece of hard land, it is bound to be flooded, which is not only a waste of water, but also bad for cotton.

Second, sealing soil many cotton fields have not yet sealed the soil for cotton seedlings, which should be carried out immediately and seal the cotton seedlings strictly with fine soil. At present, the main factor restricting the growth of cotton seedlings is the ground temperature, although the temperature is high in the day, but low at night. Soil sealing can not only increase the soil temperature at night, but also reduce the loss of soil moisture, but also stabilize the cotton seedlings and avoid shaking by the wind. Practice has also proved that those who seal the soil in time this year are conducive to the transformation of seedling conditions.

Third, some farmers disrelish the slow growth of seedlings and propose to uncover the plastic film early and thoroughly ventilate and clear ridges, which is not advisable. Practice has repeatedly proved that the plastic film must not be removed in May, depending on the temperature and the growth status of cotton seedlings, and the film will not be uncovered until June 10 at the earliest. Now that the film is uncovered, the low temperature at night is not conducive to the improvement of cotton seedlings; cotton seedlings are suddenly exposed by covering the film, and they are more susceptible to disease if they cool down in the event of rain.

Fourth, appropriate early chemical control of dense seedlings, such as high density of late seedlings, good soil moisture, easy to grow in case of high temperature. In order to avoid the formation of tall-footed, long-jointed and large-leaf seedlings, chemical control should begin from the end of May to the beginning of June, with an area of about 0.2 grams per mu to promote the strong and stable growth of seedlings and the balanced growth of the above ground and underground parts.

Fifth, sparse seedlings remain strong leaf branches in cotton fields with low density of leaf branches, each plant should leave 1 or 2 strong leaf branches to make up for the insufficient number of plants, and do not "stroke the trouser legs" too early to remove all the leaf branches.

This year's cotton planting is not higher than usual, because the price of new cotton is expected to be high, which is a high-benefit year rarely seen in many years, and the return on a certain amount of investment will be doubled or even increased several times. The seedling stage management can get twice the result with half the effort.