Spatial and Temporal Variability of N, P and K Balances for Agroecosystems in China

SHEN Run-Ping; SUN Bo; ZHAO Qi-Guo

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Spatial and Temporal Variability of N, P and K Balances for Agroecosystems in China

机译：中国农业生态系统氮，磷和钾平衡的时空变异

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Nitrogen, phosphorus, and potassium balances for agroecosystems in China from 1993 to 2001 were calculated at national and provincial levels using statistical data and related parameters, and their spatial and temporal variabilities were analyzed with GIS to estimate the potential impacts of nutrient N, P and K surpluses or deficits to soil, water and air. At the national scale, the N and P balances from 1993 to 2001 showed a surplus, with the nitrogen surplus remaining relatively stable from 1997-2001. Although during this period the P surplus pattern was similar to N, it had smaller values and kept increasing as the use of phosphate fertilizer increased year by year. However, K was deficient from 1993 to 2001 even though from 1999 to 2001 the K deficit decreased. The spatial analysis revealed higher N surpluses in the more developed southeastern provinces and lowest in the western and northern provinces where there was less chemical fertilizer input. The serious K deficit mainly occurred in Shanghai and Beijing municipalities, Jiangsu, Zhejiang and Hubei provinces, and Xinjiang autonomous regions. For the years 1992, 1996 and 2001, N surpluses and K deficits had significant positive spatial correlations with per capita gross domestic product (GDP), per capita gross industrial output value, and per capita net income of rural households. This showed that the level of economic development played an important role on nutrient balances in the agroecosystems.

机译：利用统计数据和相关参数，在国家和省级水平上计算了1993年至2001年中国农业生态系统的氮，磷和钾平衡，并利用GIS分析了它们的时空变化，以估算养分N，P和N的潜在影响。钾对土壤，水和空气的盈余或赤字。在全国范围内，1993年至2001年的氮和磷平衡显示出盈余，而1997年至2001年的氮盈余保持相对稳定。尽管在此期间磷的剩余形态类似于氮，但其值较小，并且随着磷肥的使用逐年增加而保持增加。但是，尽管从1999年到2001年钾的短缺有所减少，但从1993年到2001年钾的缺乏。空间分析表明，在较发达的东南省份，氮素过剩较高，而在化肥投入较少的西部和北部省份，氮素过剩最低。严重的钾缺乏主要发生在上海和北京，江苏，浙江和湖北省以及新疆自治区。在1992年，1996年和2001年，N盈余和K赤字与人均国内生产总值（GDP），人均工业总产值和农村家庭的人均纯收入具有显着的正空间相关性。这表明经济发展水平对农业生态系统的养分平衡起着重要作用。

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来源
《土壤圈（英文版）》 |2005年第3期|347-355|共9页
作者
SHEN Run-Ping; SUN Bo; ZHAO Qi-Guo;
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作者单位

Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

Department of Spatial Information Science, Nanjing University of Information Science and Technology, Nanjing 210044 China;

Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类土壤学;
关键词
China; economic factors; NPK balance; spatial and temporal variability;

机译：中国;经济因素;NPK平衡;时空变异;

Spatial and Temporal Variability of N, P and K Balances for Agroecosystems in China

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