网址：www.qdmiaomu.com.cn 2024-01-02 作者：admin 阅读：
柏树类苗木归于植物中抗病才能较强的一种。对于大竹县呈现立枯病的柏树林，必需求全部加强相应防治办法的施行，别的，还要确保好柏树类苗木的成长环境以及加强对柏树办理的资金和人力的投入。柏树立枯病的防治是一项综合性的系统，需求很多资源的投入。当前，国内用于柏树类苗木立枯病的防治办法首要有物理防治、化学防治和生物防治3种。这3种防治办法各有特点，在实践使用中，要依据实践需求将3种防治办法联系起来，才干到达立枯病的最佳防治效果。 1、栽培用地的科学挑选及土地改进 栽培用地的挑选。在进行柏树栽培用地的挑选时，最佳挑选前茬是柏树类苗木的育苗地，尽量防止挑选之前栽培国薯类、菜、瓜等植物的土地。柏树类苗木的育苗地中会留存很多的菌根菌类微生物，而柏树类苗木的根部会与菌根菌发作共生表象，菌根菌会推进养分的分化，增大柏树类苗木对养分的吸收，推进柏树的成长。这会使柏树的根系壮大，减小立枯病的发作。 土地改进。立枯病的病原菌首要来源于土壤，因而，需求对土壤进行改进和消毒，这样能够有用防治柏树类苗木立枯病的发作。首要，大概增施基肥，为柏树类苗木发明一个适合成长的环境，这样能够推进苗木根系的成长，进步对病原菌的反抗才能。然后，需求使用化学办法对土壤进行消毒处置，通过消毒之后，基本上能将土壤中残留的病原菌杀灭，为柏树苗木供给一个杰出的成长发育环境，对土壤进行消毒是柏树类苗木育苗成功率的有用确保。 2、科学耕种 依据柏树类树苗的成长周期，在进行柏树类树苗耕种时，能够选用地膜的办法对麦苗进行掩盖，还能够挑选适合的时刻提早进行柏树的耕种作业，这样能够使柏树类苗木当年的成长期延伸，进步柏树的成长量。一般当白日的平均温度在15℃左右时，较为适合进行柏树的耕种作业。假如温度过低，简单发作腐芽病害;相反，假如温度过高，这简单烧苗。别的，柏树类麦苗的耕种深度或许要进行合理的挑选。耕种时，一般挑选条播办法，合理操控麦苗的间隔间隔，能够为麦苗供给较好的成长空间。在种子耕种后要在土壤外表掩盖0.5cm左右的沙层，这样能够使麦苗的根部能够轻松的成长，为麦苗的成长发明杰出的环境。
Cypress seedlings are classified as a type of plant with strong resistance to disease. For the cypress forests in Dazhu County that are experiencing wilt disease, it is necessary to strengthen the implementation of corresponding prevention and control measures. In addition, it is also necessary to ensure a good growth environment for cypress seedlings and strengthen investment in funds and manpower for cypress management. The prevention and control of cypress wilt disease is a comprehensive system that requires a lot of resource investment. Currently, there are three main methods for preventing and controlling the wilt disease of cypress seedlings in China: physical control, chemical control, and biological control. These three prevention and control methods each have their own characteristics. In practical use, it is necessary to link the three prevention and control methods according to practical needs in order to achieve the best prevention and control effect of the disease. 1. Scientific selection of cultivation land and land improvement selection of cultivation land. When selecting land for cypress cultivation, it is best to choose the previous crop as the nursery for cypress seedlings, and try to avoid selecting land that previously cultivated Chinese potatoes, vegetables, melons, and other plants. The nursery of cypress seedlings will retain a lot of mycorrhizal microorganisms, and the roots of cypress seedlings will exhibit symbiotic behavior with mycorrhizal fungi. mycorrhizal fungi will promote nutrient differentiation, increase the absorption of nutrients by cypress seedlings, and promote their growth. This will strengthen the root system of cypress trees and reduce the occurrence of wilt disease. Land improvement. The primary source of pathogenic bacteria for wilt disease is soil, therefore, it is necessary to improve and disinfect the soil in order to effectively prevent the outbreak of wilt disease in cypress seedlings. Firstly, increase the application of base fertilizer to create a suitable environment for the growth of cypress seedlings, which can promote the growth of the seedling roots and improve their resistance to pathogens. Then, it is necessary to use chemical methods to disinfect and dispose of the soil. After disinfection, residual pathogenic bacteria in the soil can be basically eliminated, providing an excellent growth and development environment for cypress seedlings. Disinfection of the soil is a useful guarantee for the success rate of cypress seedling cultivation. 2. Scientific cultivation is based on the growth cycle of cypress seedlings. When cultivating cypress seedlings, plastic film can be used to cover the wheat seedlings, and suitable time can be selected for early cultivation of cypress trees. This can extend the growth period of cypress seedlings in the current year and improve their growth rate. Generally, when the average temperature during the day is around 15 ℃, it is more suitable for cultivating cypress trees. If the temperature is too low, it can easily cause rot and sprout disease; On the contrary, if the temperature is too high, it simply burns the seedlings. Additionally, the cultivation depth of cypress wheat seedlings may need to be selected reasonably. When cultivating, it is generally recommended to choose a strip sowing method and control the spacing between wheat seedlings reasonably, which can provide better growth space for wheat seedlings. After seed cultivation, a sand layer of about 0.5cm should be covered on the surface of the soil to allow the roots of wheat seedlings to grow easily and create an outstanding environment for their growth.