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近年来,生物炭由于其高pH值,强吸附能力以及比表面积等特性广泛应用于农田土壤改良。然而,针对生物炭提高土壤pH值是否会对喜酸植物茶树的生长产生影响却缺乏系统研究。研究中,通过对茶树幼苗在生物炭改良土壤中生长状况监测,系统评估生物炭改良对茶树生存以及生长状况的影响。实验设置不同生物炭添加水平(0、10、20、50、100T·hm-2),系统观测盆栽土壤的pH值以及幼年茶苗的存活率、株高、茎粗、叶片数。结果显示:生物炭改良土壤pH值高于对照土壤pH值达1.33,有效改善茶园土壤趋酸特性。此外,茶树幼苗存活率结果显示生物炭改良技术有利于幼年茶苗的存活;但对幼年茶苗的生长没有太大影响。因此,生物炭用于改善茶园土壤酸化技术具有一定的可行性。
In recent years, biocokes have been widely used in farmland soil improvement due to their high pH value, strong adsorption capacity and specific surface area. However, there is a lack of systematic research on whether biochar can increase the soil pH and affect the growth of hippocastanum tea tree. In the study, the effects of biochar improvement on the survival and growth of tea plant were systematically evaluated by monitoring the growth of tea seedlings in biochar-amended soils. The experiment set different levels of biochar (0, 10, 20, 50, 100T · hm-2). The pH value of potted soil and the survival rate, plant height, stem diameter and leaf number of young seedlings were systematically observed. The results showed that the biochar improved soil pH higher than the control soil pH value of 1.33, effectively improve tea garden acid tendency. In addition, the results of the survival rate of tea seedlings showed that biochar improved technology is conducive to the survival of young tea seedlings; but little effect on the growth of young tea seedlings. Therefore, it is feasible to use biochar to improve soil acidification in tea plantations.