鸭稻共作方式对土壤肥力因素的影响

Effects of duck-rice integrated farming system on soil fertility factors

鸭稻共作是一种较为典型的稻田生态农业模式。鸭子不停地在稻田中日夜活动对土壤肥力会产生一定的影响。通过与常规栽培方式的对比试验研究发现,除土壤速效磷含量外,鸭稻共作稻田的土壤有机质、碱解氮、交换性钾的含量均分别比常规耕作稻田的有所增高,其中某些土壤养分含量在某些生育期存在显著差异。由此初步表明,鸭稻共作生态农业模式可以实现在水稻生产全过程中不使用任何化肥和农药,而基本上可达到保持土壤肥力,生产绿色食品的目的。

Rice-duck integrated farming system is one of typical eco-agriculture models in paddy fields. In this farming system, ducks can take some effects on soil nutrients through their activities day and night. So a comparative study on changes of soil nutrient contents was conducted between rice-duck integrated farming system (RDIS) and the conventional rice farming system (CRFS). The results showed that contents of soil organic matter, available nitrogen, rapidly available potassium in the RDIS were slight higher than those in the CRFS, except for rapidly available phosphorus, and contents of some nutrients had significant differences during some growth periods between two treatments. This study showed that rice-duck integrated farming system could help to sustain soil fertility at some extent and produce healthy green food.