水保所知识产出(1956---)知识库

为了解生物炭影响土壤肥力的机理，通过盆栽实验，设置 6个生物炭水平（0、10、30、50、70、90 t/hm 2 ），测试塿土 4
个钾离子指标：水溶性钾离子、交换性钾离子、速效钾、全钾含量。结果表明，在塿土中添加生物炭后，土壤水溶性钾、速
效钾、交换性钾离子含量与生物炭添加量之间呈现 y=ae bx 指数关系，土壤 pH和土壤速效钾、交换性钾离子含量显著相关，
与水溶性钾离子、全钾含量无显著相关关系。在关中塿土中添加生物炭，可以显著提升土壤速效钾、水溶性钾、交换性钾
离子含量。考虑到土壤钾离子、酸碱度、经济因素，提前30天，在塿土中施入50 t/hm 2 生物炭效果最好。

In order to understand the mechanism of biochar affecting soil fertility, six biochar levels, 0, 10, 30, 50,
70 and 90 t/ha were set up in pot experiment, and four potassium indexes of Lou soil were tested by flame photome⁃
ter: water soluble potassium, exchangeable potassium, available potassium and total potassium. The results showed
that: after biochar was added to Lou soil, the contents of water-soluble potassium, available potassium, exchange⁃
able potassium and biochar showed an y=ae bx index relationship, and soil pH was significantly correlated with the
contents of available potassium and exchangeable potassium, but not with the contents of water-soluble potassium
and total potassium. Adding biochar to Guanzhong Lou soil can significantly increase the content of soil available po⁃
tassium, water-soluble potassium and exchangeable potassium. Taking into account the potassium ion, pH and eco⁃
nomic factors, 50 t/ha biochar was applied 30 days in advance in Lou soil is the best.