将紫云英、稻草干粉(按土重的5%)分别加入中国砖红壤、第四纪红粘土、黄棕壤、意大利红砂土、近海沉积性砂土和阿尔卑斯山灰化土中,然后加入六价铬50ppm(重铬酸钾溶液),并作某些对照处理,在室温下培育。在培育过程中,分期取样进行分离和测定,以了解绿肥分解产物;铬的还原和吸附;铁、锰的溶 The Chinese milk vetch and straw powder (5% by weight of soil) were added to Chinese brick red soil, Quaternary red clay, yellow brown soil, Italian red sandy soil, offshore sedimentary sandy soil and alpine asher soil, respectively Chromium (50 ppm) (potassium dichromate solution) was added and some controls were added and incubated at room temperature. During the cultivation process, samples were taken for separation and determination in order to understand the decomposition products of green manure; reduction and adsorption of chromium; dissolution of iron and manganese