Effect of reclaimed water irrigation on the distribution of organic carbon, nitrogen and phosphorus in different size of aggregates in sandy purple soil
Abstract：Effect of reclaimed water irrigation on the organic carbon (C), nitrogen (N) and phosphorus (P) distribution regarding different size of aggregates in sandy purple soils was investigated. The studied soils in Pengzhou City had been irrigated with reclaimed water for varying lengths of time (3 and 8 years, respectively). In purple soil irrigated with reclaimed water, organic C, total N and total P were mainly distributed in the >2mm and 2 mm aggregate fractions of those increased markedly. Besides, organic C and N in >0.25 mm aggregate fraction in irrigated soils significantly rose, whereas P in all 5 aggregate fractions distinctly increased. Furthermore, reclaimed water irrigation was favorable for formation of particulate organic C and particulate N in irrigated purple soils, and such effect was increasingly greater over irrigation time. In aggregate fractions (except for <0.053mm), the proportions of exchangeable P and HCl-P increased, whereas NaOH-P diminished correspondingly. The study concluded that reclaimed water irrigation can improve the composition of organic carbon, nitrogen and phosphorus in purple soils.
郑顺安, 陈春, 郑向群, 李松. 再生水灌溉对土壤团聚体中有机碳、氮和磷的形态及分布的影响[J]. 中国环境科学, 2012, 32(11): 2053-2059.
ZHENG Shun-An, CHEN Chun, ZHENG Xiang-Qun, LI Song. Effect of reclaimed water irrigation on the distribution of organic carbon, nitrogen and phosphorus in different size of aggregates in sandy purple soil. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(11): 2053-2059.
