Full-cover mulch can greatly reduce the air humidity in the shed and reduce the occurrence of diseases, but this is also flawed. Firstly, gas exchange between air and soil is hindered, resulting in the accumulation of carbon dioxide in the soil, lack of oxygen, and the decrease of the respiratory intensity of vegetable roots. There is also no supplementation of carbon dioxide produced in the soil in the air, and the growth of vegetables is affected. Second, due to the reduction of soil oxygen content, soil microorganisms perform anaerobic respiration or denitrification of nitrate nitrogen fertilizer, which increases harmful gases such as nitric oxide in the soil and seriously affects the normal growth of vegetable roots. Therefore, it is advisable not to cover the film in the planting line, but to spread rice husks, straw, etc. in the operation line. On the one hand, it directly prevents the water in the soil from evaporating. On the other hand, the crop stalks can absorb the moisture in the air. In addition, the crop stalks can release heat and carbon dioxide during the rot, increasing the temperature in the shed and the photosynthesis of the vegetables. effect. Potassium Fortifier,Food Grade Potassium Citrate,Potassium Citrate,Food Additive Potassium Citrate LIANYUNGANGLONGTAIWEI FOOD INGREDIENTS CO.,LTD. , https://www.longtaiweifood.com