Beets are the most cherished. Re-seeing the beet is not only a serious decline in the yield and quality of the roots, but also easily lead to the occurrence of pests and diseases, especially root rot, which is increasing year by year. The rotation cycle is generally 4 years; the area where brown spot disease and yellowing disease occur should be more than 5 years; in areas where root rot disease is serious, rotation should be carried out for more than 6 years; in the area of ​​root-root disease, rotation for 8 to 10 years should be carried out.
The best pre-productions of beets are wheat crops, canola and flax. These crops have less fertilizer absorption, shorter growth period and more soil residual fertilizer. At the same time, they can be used for cultivating grass after harvesting, which is beneficial to soil ripening, rapid restoration of soil and less weeds. Bean crops are also good pre-productions for sugar beets. Rhizobium in the roots of legume crops can fix free nitrogen in the soil, and the soil nitrogen level is high, which is beneficial to the growth of sugar beet. However, the disadvantage of the bean crop gargle is that there are more underground pests.
In addition, potatoes and corn are also good pre-productions of sugar beets. Because beets require more fertilizer, other crops that grow in sugar beet can cause malnutrition. Such as corn, sorghum often appear "red seedlings" phenomenon; soy, will be late and ripe. This is mainly due to insufficient fertilization when the sugar beet is grown, resulting in an imbalance in the proportion of nitrogen, phosphorus and potassium in the soil.
The key to solving this problem is to increase the amount of fertilizer applied in the past year, especially the application of phosphate fertilizer and potash fertilizer. Beet is used to grow wheat and corn.
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