为了提高茶园土壤质量，降低茶叶安全风险，提高茶叶品质，探究不同钝化剂对茶园土壤及茶叶品质的影响。以生物质炭、钙镁磷肥、膨润土和石灰为试验材料，进行为期一年的田间试验。4 种钝化剂均能很好地改良土壤、提升茶叶品质，减少重金属镉危害。其中，与 CK 相比，生物质炭处理土壤 pH 值、有机质和速效钾含量以及茶叶中全磷和全钾含量显著增加。石灰处理碱解氮和有效磷含量最高。钙镁磷肥处理咖啡碱含量最高。膨润土处理全氮、茶多酚、游离氨基酸和水浸出物含量最高，酚氨比最低。生物质炭、钙镁磷肥、膨润土和石灰处理下有效态镉含量与 CK相比分别下降 69。74%、66。62%、72。99%和 61。95%。施用膨润土对茶叶品质的提升效果最为明显。施加生物质炭最有利于 pH值和土壤养分的提升，对茶园重金属镉治理效果最优。
Effects of different passivators on soil and tea quality in tea plantations
In order to improve the soil quality of tea plantation,reduce the safety risk of tea and improve the quality of tea,the effects of different passivators on soil and tea quality in tea plantation were explored.Biochar,calcium,magnesium and phosphate fertilizers,bentonite and lime were used as test materials for a one-year field experiment.The four kinds of passivators can improve the soil,improve the quality of tea,and reduce the harm of heavy metal cadmium.Compared with CK,the pH value,organic matter and available potassium content of biochar treatment,as well as the total phosphorus and total potassium content in tea were significantly increased.Lime treatment has the highest content of alkali hydrolyzable nitrogen and available phosphorus.Calcium,magnesium and phosphorus fertilizers had the highest content of caffeine.The contents of total nitrogen,tea polyphenols,free amino acids and water extracts were the highest,and the phenol-ammonia ratio was the lowest.Compared with CK,the available cadmium contents of biochar,calcium-magnesium-phosphate fertilizer,bentonite and lime treatments decreased by 69.74%,66.62%,72.99%and 61.95%,respectively.The application of bentonite had the most obvious effect on the improvement of tea quality.The application of biochar was the most beneficial to the improvement of pH value and soil nutrients,and the treatment effect of heavy metal cadmium in tea plantation was the best.
NETL
NSTL
万方数据
