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浙江大学学报（农业与生命科学版）
浙江大学学报(农业与生命科学版)  2012, Vol. 38 Issue (2): 204-210    DOI: 10.3785/j.issn.1008-9209.2012.02.012
农业科学     
长期氮磷化肥配施对不同种植体系土壤交换性镁分布与累积的影响
危锋1,2, 郝明德2
1.西南林业大学 环境科学与工程学院 水土保持与荒漠化防治重点学科，云南 昆明 650224；
2.西北农林科技大学 水土保持研究所，陕西 杨陵 712100
Effect of longterm application of NP chemical fertilizer on soil exchangeable Mg distribution and accumulation under  different cropping systems.
WEI Feng1,2, HAO Ming de2
1. Key Subject of Soil and Water Conservation & Desertification Control, College of Environment Science and Engineering, Southwest Forestry University, Kunming 650224, China; 2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China
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摘要： 为了解不同种植体系对土壤交换性镁的影响，从陕西省长武县黄土高原长期定位试验站采集6个种植体系［小麦连作、豌豆小麦(2 a)+糜子轮作、红豆草小麦(2 a)轮作、豌豆小麦(2 a)+玉米轮作、玉米小麦(2 a)+糜子轮作、小麦(2 a) +糜子玉米轮作］的0~200 cm土壤剖面样品，研究22年连续施用氮磷（NP）化肥下6个种植体系交换性镁在土壤剖面上的分布与累积状况。结果表明：不同种植体系交换性镁在土壤剖面上发生淋溶累积现象，在60~100 cm土层产生累积峰；交换性镁的累积峰值由高至低分别为：红豆草小麦(2 a)轮作263 mg·kg-1、小麦(2 a) +糜子玉米轮作255 mg·kg-1、玉米小麦(2 a)+糜子轮作250 mg·kg-1、豌豆小麦(2 a)+糜子轮作248 mg·kg-1、小麦连作244 mg·kg-1、豌豆小麦(2a)+玉米轮作243 mg·kg-1；不同种植体系0~200 cm土壤交换性镁的总累积量由高至低分别为：红豆草小麦(2 a)轮作6152 kg·hm-2、小麦(2 a)+糜子玉米轮作5855 kg·hm-2、豌豆小麦(2 a)+糜子轮作5853 kg·hm-2、玉米小麦(2 a)+糜子轮作5755 kg·hm-2、豌豆小麦(2 a)+玉米轮作5740 kg·hm-2、小麦连作5347 kg·hm-2。不同种植体系交换性镁在土壤剖面上分布与累积差异的原因主要是由作物和种植方式的不同引起的。
Abstract: To understand the effects of different cropping systems on soil exchangeable Mg, samples of soil profiles under six types of different cropping systems were collected from longterm location experiment station, Changwu County, Shaanxi Province. The changing conditions of exchangeable Mg in soil profiles of different cropping systems under the condition of 22 years' continuous application of NP chemical fertilizer in Loess Plateau were studied. The results showed that the exchangeable Mg occurred eluviation and accumulation in soil profiles of different cropping systems. The peak was at 60100 cm soil depth with the values of 263, 255, 250, 248, 244 and 243 mg·kg-1 under the sainfoinwheat (2 a) rotation, wheat (2 a) + milletmaize rotation, maizewheat (2 a) + millet rotation, peawheat (2 a) + millet rotation, wheat succession and peawheat (2 a) +maize rotation systems, respectively. The cumulative amounts of exchangeable Mg in soil profiles (0200 cm) under the sainfoinwheat (2 a) rotation, wheat (2 a) + milletmaize rotation, peawheat (2 a) + millet rotation, maizewheat (2 a) + millet rotation, peawheat (2 a) + maize rotation and wheat succession were 6152, 5855, 5853, 5755, 5740 and 5347 kg·hm-2, respectively. The results suggest that the different crops and cropping systems have effects on difference of exchangeable Mg distribution and accumulation in soil profile.
出版日期: 2012-03-20
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引用本文:

危锋,郝明德. 长期氮磷化肥配施对不同种植体系土壤交换性镁分布与累积的影响[J]. 浙江大学学报(农业与生命科学版), 2012, 38(2): 204-210.

WEI Feng,HAO Ming de. Effect of longterm application of NP chemical fertilizer on soil exchangeable Mg distribution and accumulation under  different cropping systems.. , 2012, 38(2): 204-210.

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http://www.zjujournals.com/agr/CN/10.3785/j.issn.1008-9209.2012.02.012    或    http://www.zjujournals.com/agr/CN/Y2012/V38/I2/204

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