Changes in the soil environment from excessive application of fertilizers and manures to two contrasting intensive cropping systems on the North China Plain
Changes in the soil environment from excessive application of fertilizers and manures to two contrasting intensive cropping systems on the North China Plain
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DOI：
10.1016/j.envpol.2006.04.017
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发表时间：
2007-01-01
影响因子：
8.9
通讯作者：
Zhang, F. S.
中科院分区：
文献类型：
--
作者：
Ju, X. T.;Kou, C. L.;Zhang, F. S.
比较了5-15年前从小麦-玉米轮作区转移过来的温室蔬菜系统和小麦-玉米轮作区过量施用化肥和有机肥对土壤环境的影响。温室的氮、磷和钾盈余分别为4328、1337和1466 kg ha（-1）年（-1），而小麦-玉米田分别为346、65和-163 kg ha（-1）年（-1）。随后，大量的矿质氮和有效磷和钾在土壤中积累，并在温室土壤剖面中发生淋溶。蔬菜地土壤pH值显著低于小麦-玉米地，而EC值显著高于蔬菜地。菜地土壤中Cd的平均含量是小麦-玉米轮作土壤中Cd的2.8倍。由于中国东北地区温室蔬菜生产中过量施肥，过量的盐和硝酸盐浓度可能会积累，土壤质量可能比传统的小麦-玉米轮作更快地恶化。(c)2006爱思唯尔有限公司保留所有权利。
Effects of excessive fertilizer and manure applications on the soil environment were compared in greenhouse vegetable systems shifted from wheat-maize rotations 5-15 years previously and in wheat-maize rotations. N, P and K surpluses to the greenhouses were 4328, 1337 and 1466 kg ha(-1) year(-1), respectively compared to 346, 65 and - 163 kg ha(-1) year(-1) to wheat-maize fields. Subsequently, substantial mineral N and available P and K accumulated in the soil and leaching occurred down the soil profile in the greenhouses. Soil pH under vegetables was significantly lower than in the wheat-maize fields, while the EC was significantly higher in the vegetable soils. The mean Cd concentration in the vegetable soils was 2.8 times that in the wheat-maize rotations. Due to excessive fertilizer application in greenhouse vegetable production in northeast China, excessive salt and nitrate concentrations may accumulate and soil quality may deteriorate faster than in conventional wheat-maize rotations. (c) 2006 Elsevier Ltd. All rights reserved.