江西农业大学学报2012，Vol.34Issue(2)：403-408,6.
长期不同施肥对南方丘陵红壤旱地生产力和土壤结构的影响
Effect of Long-term Fertilization in Different Patterns on the Productivity and Soil Structure of Red Hilly Upland in Southern China
摘要
Abstract
\ Fertilization practice can significantly affect soil aggregation and structure in cropland. In the present study, the effect of long-term fertilization in different patherns on the year-round productivity and soil structure in red upland with double corn cropping was investigated. The results showed that compared with the unfertilized control, inorganic: NPK fertilization and manure amendment (M and NPK + M) significantly increased the year-round corn yield and its stability. Inorganic N fertilization significantly increased corn yield, but did not increase its stability. Corn yields showed significantly declining trends in the control and N treatments with increasing experimental duration, while increasing in the manure - applied plots with no significant trend in the NPK treatment. Compared with the control, long-term manure application significantly reduced soil bulk density in the plow layer, increased the content of soil organic matter, and promoted the formation of soil macroaggregates ( > 2 000 μm) with a corresponding decline in the proportion of microaggregates (53 ～ 250 μm) , while no significant effects were found in the inorganic fertilization treatments. Furthermore, the values of mean weight diameter and geometric mean diameter were significantly higher in the manure-applied treatments compared with the control, but not in the inorganic fertilization treatments. Thus, long-term manure amendment improves soil structure and organic matter content in the red upland, thereby enhancing the stability and sustainability of crop production.关键词
长期施肥/南方丘陵/红壤旱地/土壤结构/湿筛法Key words
long-term fertilization/ hilly area/ red upland/ soil structure/ wet-sieving method分类
农业科技引用本文复制引用
黄山,潘晓华,黄欠如,余喜初,李昌新,张卫建..长期不同施肥对南方丘陵红壤旱地生产力和土壤结构的影响[J].江西农业大学学报,2012,34(2):403-408,6.基金项目
教育部新世纪优秀人才资助计划(NCET-05-0492)和国家“十二五”粮食丰产科技工程(2011BAD16B14)资助 （NCET-05-0492）
