浙江农业学报

• 环境科学 • 上一篇    下一篇

硅磷配施对水稻土中不同磷组分含量及有效性的影响

  

  1. (1浙江省森林生态系统碳循环与固碳减排重点实验室,浙江农林大学 环境与资源学院,浙江 临安 311300;2中国农业科学院 茶叶研究所,农业部茶树生物学与资源利用重点实验室,浙江 杭州310008)
  • 出版日期:2014-11-25 发布日期:2014-12-02

Effects of mixing fertilization of silicon and phosphorus on fractionation and availability of phosphorus in a paddy soil

  1. (1 Zhejiang Provincial Key of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, College of Environmental and Resource Sciences, Zhejiang Agricultural and Forestry University, Linan 311300,China;2 Tea Research Institute of Chinese Academy of Agricultural Sciences and the Key Laboratory for Plant Biology and Resource Application of Tea, the Ministry of Agriculture, China, Hangzhou 310008, China)
  • Online:2014-11-25 Published:2014-12-02

摘要: 为探明硅磷互作与土壤中磷有效性的关系,盆栽试验条件下研究不同比例硅磷配施对水稻土中不同形态磷含量及其有效性的影响。试验中硅肥和磷肥分别设3个水平,共9个处理。结果表明,硅磷配施能够对水稻土中磷组分的含量产生不同影响。中磷水平下增施硅肥可提高磷肥的有效性,减少土壤中磷的固定,但在高磷高硅水平下,可能会降低土壤磷的有效性和土壤中有效磷含量,并抑制水稻植株对水稻土中有效磷的吸收,降低其他形态磷向有效态磷的转换。在该试验条件下,中硅水平的水稻产量随着磷肥水平的提高而增加,但高硅水平水稻干物质重和穗重却在高磷的水平下降低;与对照相比,中硅高磷水平下的水稻生长和产量提高幅度最大。

关键词: 硅肥, 互作, 磷有效性, 水稻土

Abstract: The study investigated the effects of fertilization with different ratios of silicon and phosphorus fertilizers on the contents and bio\|availability of different phosphorus fractions in a paddy soil through pot experiment. Three levels of silicon and phosphate fertilizer treatments were carried out, i.e., a total of nine treatments. The purpose of the study is to improve the phosphorus use efficiency in a paddy soil. The results showed that silicon and phosphorus fertilizers could have different impacts on different phosphorus fractions in the paddy soil. Slight to moderate silicon fertilizer applying could improve the efficiency of phosphate fertilizer, reduce the fixation of phosphorus in soil. However, high silicon with high phosphorus level (SihPh) might inhibit the activity of available phosphorus, decrease soil available phosphorus content, decrease plant phosphorus absorption, and reduce the transformation of other phosphorus forms to available phosphorus. The treatment of SimPh gained the fastest growth and highest grain yield.

Key words: silicon fertilizer, interaction, availability of phosphorus, paddy soil