Matters needing attention for changing stubble of vegetables in greenhouse in winter

It is also the peak period of vegetable stubble change in winter greenhouse. It is suggested that vegetable farmers should pay attention to the following points when vegetable stubble change in winter greenhouse:

1. Deep turning of soil to improve soil environment Due to the growth of vegetables in the last crop, the soil in the shed has become hardened and the air permeability has become poor after watering and operation. If deep turning is not carried out, it will directly affect the rooting of the next crop and cause the phenomenon of retting roots. In addition, the ground temperature rises slowly.

Second, soil treatment to reduce the occurrence of soil-borne diseases After the planting and growth of the last crop of vegetables, a large number of germs and eggs accumulated in the soil will cause infection of the next crop of vegetables. If no soil treatment is carried out, the incidence of the next crop will be increased. It is suggested that low temperature fumigant should be selected outside the shelter, and diclofenac or potassium permanganate should be sprayed into the ground to prevent soil-borne diseases when the soil is deeply ploughed; thiazophos or abamectin should be applied to the rhizosphere of crops during planting to prevent nematode damage.

3. Reasonable fertilization, prevention and control of root burning and fumigation. In winter, the greenhouse has less ventilation time and is covered with plastic film. If the vegetable farmers apply undecomposed manure during soil preparation, the harmful gases generated during the decomposition process of manure cannot be dispersed, and the roots and leaves of crops close to the damaged parts of the ground film are extremely vulnerable, resulting in root burning and fumigation. It is suggested that vegetable farmers should sow completely decomposed manure or commercial organic fertilizer in deep ploughing soil.