摘要
通过田间试验和室内土壤物理性质测定,研究了不同灌溉施肥模式对水稻土三相组成变化的影响。试验采用淹灌、间歇灌2种灌溉模式与不施氮肥、含氮复合肥、缓控释氮肥、有机无机氮肥4种施肥模式配成8个处理。结果表明:随着土壤脱水,各处理间土壤总孔隙度差异加大,各类型孔隙度均有变化,土壤液相比分减小,固相与气相比分增加;间歇灌与淹灌相比和有机无机氮肥与其他施肥模式相比,同一含水量下固相和液相比分较小,气相比分较大,非毛管孔隙度明显增大,毛管孔隙度虽有减小但能保持正常水量,对土壤三相组成的整体影响较好。
In this paper, through field experiments and indoor soil physical properties measuring, the effect of different irrigation and fertilization mode on soil physical properties was studied. The Two irrigation modes, including flooding and intermittent irrigation, and four fertilization modes, including no nitrogen fertilizer, nitrogen-containing compound fertilizer, controlled-release nitrogen fer- tilizer, organic and inorganic nitrogen fertilizer, were adopted to combine eight experimental treatments. The results showed that with the soil dehydration, the differences of the total porosity among treatments increased, the porosity of all the treatments changed, the soil liquid phase score reduced, and the solid phase and gas phase score increased; Comparing the intermittent irrigation treatment with the flood irrigation treatment, the organic and inorganic nitrogen treatment with other fertilization treatments, the solid and liquid phase score was small under the same water content, the gas phase score was larger, the non-capillary porosity increased, the capillary porosity reduced but could maintain normal consumption, the overall effect on the composition of soil three phases was good.
出处
《节水灌溉》
北大核心
2014年第1期9-12,16,共5页
Water Saving Irrigation
基金
水资源与水电工程科学国家重点实验室开放研究基金资助项目(2011B082)
水利部"948"项目(201229)部分研究内容
水利部公益行业科研专项经费项目(201101040)
关键词
水稻土
节水灌溉
灌溉模式
施肥模式
土壤三相组成
paddy soil
water-saving irrigation
irrigation mode
fertilization mode
soil three phase composition
作者简介
陈祯（1973），女，讲师，博士，主要从事土壤水分检测与土壤孔隙结构研究。E-mail：chenzhen1010@126．com。
