Continuous cropping is vulnerable to virus and zombie
The lotus root production often appears to be stabbed, showing that the plant growth potential is weak, the new body is stiff and thin, the skin is thick and hard, and the top bud, the taro, the middle cut end has necrotic burnt streaks, twisted deformity, easy to break, yield The quality is declining and even unbearable. From the middle of July to the beginning of August, the rhizome of the lotus roots began to expand, and the surface appeared 1 mm to several millimeters long brown spots. As the disease progressed, along the direction of the underground stems, multiple spots expanded and joined together. Longitudinal streaks of several centimeters or more of 10 cm or more are formed, the stripe is 0.5 to 1.5 mm wide, and the streaks are deep into the tissue to 2 to 6 mm. It has been studied that the disease is caused by virus infection, and the virus can be transmitted through poisonous species and soil, and it has not been found to spread through running water and insect vectors. Years of continuous cropping caused soil organic matter, especially active substance humus, to decrease year by year, soil reductive substances are increasing, and long-acting nutrients are decreasing. These are not conducive to the growth and development of lotus root, but are conducive to the proliferation of zombie viruses, resulting in increasing degrees of rigidity. . At the same time, it does not pay attention to the selection of good varieties, resulting in mixed varieties and degradation, disease resistance, and fertilizer application in Putian mainly, with little or no application of organic fertilizer, is also an important reason for the increasing degree of lotus root rigidity. Comprehensive measures should be taken to avoid the occurrence of stagnation. The first is to use healthy scorpions without rigid symptoms to make seeds; the second is to shorten the continuous cropping years of squatting, generally no more than 5 years, and implement the cultivating of cultivars or the rotation of calamus, medlar and japonica rice, and the rotation of water and dryness is better; Before the winter, all the fields were drained, drained and ploughed, winter ploughed and frozen, spring ploughed and sun-dried, and then planted in the field; fourth, the lotus root capsule special fertilizer was used to provide comprehensive nutrition, and can be slowly released to promote growth and prevent premature aging. Increasing the level of disease resistance can significantly reduce the degree of rigidity. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Cervical Ripening Balloon,cervical dilation Catheter,Silicone Cervical Ripening Balloon,Silicone Cerivcal Dilation Catheter Anesthesia Medical Co., Ltd. , https://www.medicaldiverse.com