Mulberry has a deep root system, strong drought resistance, but in the fall of continuous high temperature and drought water shortage, new shoots and leaves grow slowly, and even stop growing prematurely, new shoots early capping, leaf aging, thus affecting cocoon production. At the same time, due to the lack of water in the mulberry tree, the stomatal opening is reduced, carbon dioxide is blocked in the stomata, and because the transpiration is weakened or stopped, the synthesis of organic matter cannot be carried out or reduced. On the other hand, due to the increase of drought and temperature, the respiration is strengthened, and the stored organic materials are consumed in great quantities, so that the loss of coordination between assimilation and dissimilation affects the synthesis and balance of organic matter, resulting in the production of autumn leaves in autumn and the following year. decline.
Therefore, in the summer and autumn, if continuous high temperature and drought are encountered, the soil moisture in the mulberry garden is insufficient. When the shoot ends have not stopped growing, the conditional mulberry field should be timely irrigated, and should be avoided during hot noon irrigation. Due to the hot noon irrigation, the soil temperature suddenly drops, causing roots to absorb water, and the mulberry tree grows temporarily. Therefore, it should be appropriate at night, and it is necessary to speed the irrigation and do not flood it for too long. In addition, do a good job in mulberry fields covered with straw or grass cover, covering the thickness of 5-10 cm. It can not only inhibit the growth of weeds, but also resist drought and water, and it is also a very good organic fertilizer after the cover is rotted. The second is to do a good job of mulberry field shallow cutting, which can reduce the growth of weeds, and at the same time can cut off the soil capillary, reduce the evaporation of soil moisture in the mulberry garden, to achieve the purpose of drought resistance.
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