生态环境学报Issue(5)：769-776,8.
一稻两鸭共作对稻田土壤养分动态的影响
Dynamics of soil nutrients under rice-duck farming system with two-batch-duck raising
摘要
Abstract
Rice-duck farming is an organic farming system for the maintenance of soil fertility with duck manure. Such system helps reduce the pollutants induced by chemical fertilizers and pesticides. Nevertheless, the productivity of such organic farming system is frequently limited due to the lack of sufficient chemical fertilizers. In order to supply sufficient soil nutrients, this paper proposes two-batch-duck raising with rice farming, including the rotational pasturing with two-batch-duck raising (RP) and the mixedpasturing with two-batch-duck raising (MP). The soil nutrients in these two proposed systems were monitored and compared with the ones in conventional rice monocropping (CR) and conventional rice-duck farming system (CD) through filed experiments. Compared with the CR treatment, the results showed that CD, RP and MP treatments led to the increase in the total N and total K contents. In addition, treatments including CD, RP and MP all resulted in less consumption of alkali-hydrolysis N. The soil organic matter (SOM) in these three treatments had different levels of increases after harvesting whereas it decreased in the CR treatment. All four treatments experienced significant reductions in the total P in soil after harvest, of which less reductions were observed in the RP and MP treatments as compared to the CR treatment. Specifically, the total P in the RP and MP treatments post early rice harvest was 13.53% and 11.01% higher than that of CR treatment, respectively. Compared with the CD treatment, both two-batch-duck raising systems led to the increased accumulation of SOM, total nitrogen and total potassium contents, and delayed the reductions in alkali-hydrolysis N, available P, available K, and total P in soil. Compared with the CD treatment, the contents of alkali-hydrolysis N, available P and available K in the MP treatment post harvest were increased by 3.7%, 10.39% and 7.59%, respectively. Besides, the rice yield in MP treatment was increased by 12.90% in the early rice season and 12.19% in the late rice season compared to that of CD treatment. These findings indicate that both the RP treatment and MP treatment outperform the CD treatment on improving soil fertility and nutrient utilization in paddy fields. This should be attributed to the increase in the pasture time in the two proposed systems with more duck feces and the effect of intertillage and muddying during all the growth stages of rice.关键词
鸭稻共作/一稻两鸭/土壤养分/养分消长Key words
rice duck farming system/two-batch-duck raising systems/soil nutrition/dynamics of soil nutrients分类
农业科技引用本文复制引用
梁开明,章家恩,林田安,全国明,罗明珠,赵本良..一稻两鸭共作对稻田土壤养分动态的影响[J].生态环境学报,2014,(5):769-776,8.基金项目
国家重大基础研究（973）计划课题（2011CB100406）；国家自然科学基金(31300371)；广东省科技计划项目（2009B020311012；2012A020100003；2012B020310005）；广东省现代农业产业技术体系建设专项（粤农[2009]380号）；国家科技支撑计划 （31300371）
