Climatic Experiment on Guizhou Red Heart Kiwifruit Ulcer Disease

Using the climatic data, such as extreme minimum temperature and relative humidity, in 15 bases in the main planting area of Guizhou Red Heart Kiwifruit from December 1st to next April 30th, respectively, from 2010 to 2018, combined with the monitoring of red heart kiwifruit ulcer disease, we analyze the occurrence and prevalence of meteorological factors and dynamic characteristics of the red heart kiwifruit ulcer disease in Guizhou, China. The results showed that the main period of occurrence and prevalence of red heart kiwifruit ulcer was from March to April. In winter, when the daily average temperature of 5 d and above is ≤2°C, the daily extreme minimum temperature is ≤−2°C, and the daily average relative humidity is ≥75%, it is beneficial for the ulcer pathogen to lurk and propagate in the plant. It is suggested that this meteorological condition should be used as an early warning indicator for the prevention of ulcer disease of red heart kiwifruit, in order to actively organize prevention after the emergence of early warning indicators to improve the prevention and treatment effect. In spring, the average daily temperature of 5 d and above is ≤18°C, and the daily average relative humidity is ≥80%, which is easy to induce ulcer disease. It can be seen that the first is the winter climatic conditions to meet the breeding of ulcer disease, and then the spring climatic conditions must also meet the rapid propagation of ulcer disease, ulcer disease can occur, develop and popularize. It is of great practical significance to carry out experiments on the relationship between the occurrence of ulcer disease in Guizhou red heart kiwifruit and meteorological conditions.

Analysis on the Ecological and Climatic Advantages of Tea Production in Western Guizhou

The ecological and climatic conditions in the main tea areas of western Guizhou were analyzed,and the comparison with Meitan,Duyun and Leishan tea areas in Guizhou Province was conducted. The results showed that spring,summer and autumn tea can be picked in western Guizhou Province;spring tea can be picked for about 100 d,and summer and autumn tea can be picked for about 50 d. The average content of amino acids in tea from western Guizhou was 0.9%-2.9% higher than the national average,and the average content of polyphenols was 10.9% lower than the national average maximum,while the average content of caffeine was 1.4% lower than the national average maximum. In the first ten days of February,the temperature in the western tea area began to rise,which was earlier than Meitan,Duyun,Leishan tea areas and had a larger warming range,which was conducive to the germination of tea trees. The average temperature of ten days in the western tea area from middle May to early July was lower than that of Meitan,Duyun and Leishan tea areas,and the temperature rise was not violent,which was conducive to the growth of summer shoots and vigorous growth of tea buds. The ten-day average temperature of the western tea area from the first ten days of August to the last ten days of September was lower than Meitan,Duyun and Leishan tea areas,and its precipitation was more than Meitan,Duyun and Leishan tea areas,and the number of rainy and foggy days was more. The climate conditions are favorable for the formation of tea quality.