论文部分内容阅读
应用选择溶解性的化学提取和幼苗试验等方法，研究了湖南省几种耕型红壤及其发育而成的水稻土铜的化学形态及其与土壤有效铜的关系，以及红壤旱地改水田后施铜对水稻吸铜和幼苗生长的影响．结果表明，供试土壤中的铜主要以有机态（１５．２％ ）、无定形铁态（１１．７％ ）、晶形铁态（１７．２％ ）和残留态（５６．０％ ）４ 种形态存在，其中红壤性水稻土有机态铜（１８．７％ ）和无定形铁态铜（１４．６％ ）明显高于耕型红壤（分别为８．０％ 和５．８％ ），而晶形铁态铜和残留态铜含量则是后者高于前者．红壤性水稻土有效铜含量显著高于耕型红壤．幼苗试验结果表明，耕型砂岩红壤施铜能明显促进水稻幼苗对铜的吸收，最佳施铜量为 ５～１０ ｍ ｇ／ｋｇ 土．
Chemical selection and seedling experiment were used to study the chemical forms of Cu and its correlation with available copper in several cultivated red soils in paddy soils and their developed paddy soils. Effect of Copper on Copper Absorption and Seedling Growth of Rice. The results showed that the main copper in the soils was organic (15.2%), amorphous iron (11.7%), crystalline iron (17.2%) and residual (56.0%) 4 Among them, organic copper (18.7%) and amorphous iron copper (14.6%) in red paddy soil were significantly higher than those in red soil (8.0% and 5.8% respectively) The crystalline iron and residual copper content is the latter than the former. The available copper content in red paddy soil was significantly higher than that in red soil. The results of seedling experiment showed that application of copper in red soil of cultivated sandstone could obviously promote the copper absorption of rice seedlings. The best copper application rate was 5 ~ 10 m g / kg soil.