【摘要】 采用野外调查采样分析和田间试验方法研究了湖南省主要茶园生态系统中土壤Zn的形态及其有效性。结果显示:①成土母质明显影响土壤中各种形态Zn的含量,与母质本身的特性有关;②生物+秸秆和秸秆覆盖处理能明显提高茶园土中有效态Zn与有机态Zn的含量,而对其他形态Zn的含量影响不太明显;③土壤中对有效态Zn(AZn)含量影响最大的是交换态Zn(ExZn)与无定形氧化铁结合态Zn(AFeZn),其次为氧化锰结合态Zn(MnOZn)、有机态Zn(OMZn)及晶形氧化铁结合态Zn(CFeZn)。更多还原

【Abstract】 Field survey and soil sampling for test were conducted of major tea gardens in Hunan Province to study forms and availability of zinc in the soil ecosystems. Results showed that parent material has a significant impact on form and content of soil zinc, which is related to characteristics of parent material; mulching (using biological material + crop straws) could stimulate transformation of soil zinc into available forms, notably increasing the content of available zinc and organic zinc in the tea garden soil, but does not have much influence on the content of other forms of zinc; and in terms of effect on available zinc (AZn) exchangeable, zinc (ExZn) is in the lead and followed by amorphous ferric-oxide-bonded zinc (AFeZn), manganese-oxide-bonded zinc (MnOZn), organic zinc (OMZn) and crystalloid ferric-oxide- bonded zinc(CFeZn).更多还原