ISWC OpenIR  > 水保所知识产出(1956---)
长期施用化肥条件下土团聚体中有机碳与养分分布
何瑞清1,3; 王百群1,2; 张燕1; 王蕊1
2016
Source Publication水土保持通报
Volume36Issue:6Pages:347-351
Abstract

[目的]探究长期施肥与小麦—玉米轮作下土表层水稳性团聚体组成及对团聚体中有机碳和养
分分布的影响,为评价长期施肥对改善土肥力状况的影响提供科学依据。[方法]利用田间长期施用化
肥与轮作定位试验,通过湿筛法分离土壤水稳性团聚体,得到土壤团聚体构成,并测定不同粒径团聚体中
有机碳和养分的含量。[结果]结果表明长期施用化肥显著影响土壤水稳性团聚体含量,长期施肥降低了
>2mm的水稳性团聚体数量,增加了<1mm的水稳性团聚体含量。施肥在一定程度上提高了水稳性团
聚体有机碳的含量,但施用高量氮、磷下0.25~0.5mm和<0.25mm水稳性团聚体中有机碳含量明显低
于施用低量氮、磷肥料。不同施肥处理土壤水稳性团聚体全氮含量变化趋势与水稳性团聚体有机碳含量
基本一致。磷素在不施肥处理各粒径团聚体中均匀分布,低氮、磷处理各粒径团聚体中全磷含量差异较
小,高氮、磷处理各粒径土壤团聚体中全磷含量变化无明显趋势。长期施肥降低了>2mm水稳性团聚体
中全K含量,增加了<2mm的水稳性团聚体中全K含量。[结论]水稳性团聚体关系土壤有机碳、氮的数
量,水稳性团聚体及其中有机碳、氮含量在氮磷化肥的长期施用下变化无明显规律,并且,长期施用氮、磷
化肥下土壤磷素和钾素在土壤中的保存及供应能力也受到影响。因此,需要合理施肥管理,促进农田生产
力的可持续发展。

Other Abstract

[Objective]Studing the effects of long-term-fertilization in wheat-corn rotation field with Lou soil
on water stable aggregates and soil nutrient distribution in different sizes of aggregates,to provide a scientific
basis for the evaluation of long term-fertilization on its improvement effect.[Methods]The wheat-corn rotation
field with long-term application of chemical fertilizer was selected as the study site.The composition of
aggregates was analyzed using the wet sieve method.Contents of organic carbon and nutrients in different
sizes of aggregates were measured.[Results]Long-term application of chemical fertilizers significantly
affected soil water stable aggregate contents.Long-term fertilization reduced the contents of>2mm soilwater stable aggregates,but increased<1mm soil water stable aggregate contents.To a certain extent,the
amount of organic carbon in water stable aggregates increased,but the organic carbon contents of 0.25~
0.5mm and<0.25mm soil water stable aggregates under high nitrogen and phosphorus treatments were
significantly lower than that of the low nitrogen and phosphorus treatment.The changing tendencies of contents
of total nitrogen in soil water stable aggregates were essentially in agreement with organic carbon in soil
water stable aggregates under different fertilization treatments.Distribution of phosphorus in different size
soil water stable aggregates was even in no fertilization treatment.The difference of phosphorus content in
each size soil water stable aggregate was insignificant under low nitrogen and phosphorus treatment,while
the trend in high nitrogen and phosphorus treatment was not obvious.The total potassium contents of>
2mm soil water stable aggregates decreased due to long-term application of chemical fertilizer,whereas total
potassium contents of<2mm soil water stable aggregates increased under long-term application of fertilizer.
[Conclusion]Soil water stable aggregates influenced the quantity of soil organic carbon and nitrogen.The
contents of soil water stable aggregates,soil organic carbon and nitrogen of soil water stable aggregates varied
irregularly under long-term application of nitrogen and phosphorus fertilizers.In addition,conservation
and supply capacity of phosphorus and potassium in soil were affected by long-term application of nitrogen
and phosphorus fertilizers.Therefore,reasonable use of chemical fertilizers and management were needed to
improve the soil structure,maintain soil fertility and promote the sustainability of farmland productivity.

Keyword 长期施用化肥 团聚体 有机碳 养分
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8766
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室
2.中国 科学院水利部水土保持研究所
3.云南省文山壮族苗族自治州土壤肥料工作站
Recommended Citation
GB/T 7714
何瑞清,王百群,张燕,等. 长期施用化肥条件下土团聚体中有机碳与养分分布[J]. 水土保持通报,2016,36(6):347-351.
APA 何瑞清,王百群,张燕,&王蕊.(2016).长期施用化肥条件下土团聚体中有机碳与养分分布.水土保持通报,36(6),347-351.
MLA 何瑞清,et al."长期施用化肥条件下土团聚体中有机碳与养分分布".水土保持通报 36.6(2016):347-351.
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