In recent days, many friends have mentioned that the spring cold is coming, crops will have different degrees of frost damage, and the yield reduction is more serious. Some farmers said that vegetables have fallen cold in the spring, and the reduction in production is also very serious. Carob planted in early spring, slow growth, will frost damage occur when the spring cools down?
In March to April, the spring cold occurs frequently, the cold resistance of the beans is weak, when the temperature is 10 to 15 ° C, the plant grows slowly, and when the temperature is low, there will be frost damage, and even the whole plant will die. When the low temperature comes, if the insulation measures are not taken, the beans will be frost damage after the emergence of seedlings.
When the carob seedling stage encounters low temperature, the vitality of the root system is poor, the phosphorus absorption is insufficient, the base of the stem is red, and the growth is slow. If the seedlings are frost damaged, it will have an impact on the late flowering pods and reduce the yield. Therefore, planting beans in the spring, in order to prevent frost damage, you should pay attention to the following points:
1. Adjust the sowing period
When carob is planted in early spring, it usually starts in March, and some farmers blindly sow seeds early in order to extend the harvest period. However, when sowing seeds too early, rotten seeds will also occur at low temperatures, and dead seedlings will appear after the emergence of seedlings by low temperature frost, and the seedlings will grow weakly, so that they will not achieve high yields.
Therefore, when sowing in the open field in spring, the minimum temperature should be stable above 15 ° C, and it is generally suitable for sowing after qingming. If you want to raise seedlings in advance, you should sow seedlings in the protected area, colonize them after the end of the late frost, and colonize them before mid-March, and take thermal insulation measures.
2. Cultivate strong seedlings
When carob seedlings grow strongly, their cold resistance is enhanced. If you want to cultivate strong seedlings, in addition to sowing seeds at the right time, you must also pay attention to several aspects. First, when raising seedlings on the seedbed, the seedbed should be disinfected to prevent blight. When watering, carbendazim can be used to flush it again to reduce the occurrence of diseases at the seedling stage. Second, when raising seedlings, it is best to use the method of on-demand sowing, sowing 3 to 4 seeds per hole, and keeping the soil moist after sowing, so that the seedlings are neat and robust.
3. Take antifreeze measures
After the beans are colonized, farmers can spray amino acid foliar fertilizer and brassica to promote root growth, quickly slow seedlings, and grow new roots. Soil drought plots should be lightly watered before the arrival of low temperature cold snaps to improve soil moisture and reduce ground temperature changes. If no measures are taken, when the cold snap comes, it should be warmed and covered in time to prevent frost damage.
When spring beans encounter spring cold and there is a slight frost damage, it is necessary to spray foliar fertilizers such as potassium dihydrogen phosphate and urea in time to promote the recovery of plant growth and alleviate the symptoms of redness of phosphorus deficiency roots. In addition, it is necessary to loosen the soil around the root system in time to increase the ground temperature. When the frost damage of beans is more serious, it is necessary to replant and supplement seedlings in time to ensure yield.