资源科学 ›› 2016, Vol. 38 ›› Issue (9): 1681-1691.doi: 10.18402/resci.2016.09.06
收稿日期:
2016-04-07
修回日期:
2016-07-20
出版日期:
2016-09-25
发布日期:
2016-09-22
作者简介:
作者简介:伦飞,男,山东寿光人,讲师,研究方向为土地资源管理、农田物质循环。E-mail:
基金资助:
LUN Fei1,2(), LIU Junguo3(
), ZHANG Dan4
Received:
2016-04-07
Revised:
2016-07-20
Online:
2016-09-25
Published:
2016-09-22
摘要:
增加粮食产量、提高磷肥使用效率以及减少环境面源污染一直是中国各界关注的焦点。本文基于物质流分析的方法,通过构建动态模型,科学评估了1961-2011年中国农田系统磷收支;探讨了中国农田磷投入与农作物产量、磷使用效率之间的关系;对比分析了不同时期不同农作物农田磷收支变化情况。研究表明,1961-2011年,中国农田磷投入量增加了7.93倍,磷输出量增加了2.89倍,磷循环利用量增加了2.65倍;磷投入的构成由以人畜粪便为主(76.45%),转变为以磷肥为主(70.54%);中国农田系统磷使用效率呈下降趋势,由20世纪60年代的0.6左右下降到现在的0.3左右;农作物产量呈正相关,而磷使用效率与农田磷投入呈负相关。总的来看,中国农田系统磷收支经历先损失后积累的过程,1971年为转折点,到2011年时,中国农田土壤累积磷积累量达到71.18 Mt P。本文的研究为合理确定农田磷投入量,提高农田磷使用效率,减缓农田土壤磷积累,减轻农村面源污染等问题提供了科学依据。
伦飞, 刘俊国, 张丹. 1961-2011年中国农田磷收支及磷使用效率研究[J]. 资源科学, 2016, 38(9): 1681-1691.
LUN Fei,LIU Junguo,ZHANG Dan. Trends in cropland P balance and P use efficiency in China from 1961 to 2011[J]. Resources Science, 2016, 38(9): 1681-1691.
表1
1997年和2010年中国不同农作物的农田磷收支状况"
农田磷投入量/ kgP/(hm2 | 农作物单位面积磷产量/ kgP/(hm2 | 农田磷收支量/ kgP/(hm2 | 农田磷使用效率 | |||||
---|---|---|---|---|---|---|---|---|
1997年 | 2010年 | 1997年 | 2010年 | 1997年 | 2010年 | 1997年 | 2010年 | |
小麦 | 55.39 | 43.03 | 15.59 | 18.04 | 35.40 | 18.63 | 0.28 | 0.42 |
水稻 | 35.44 | 32.46 | 15.78 | 16.37 | 10.93 | 6.03 | 0.45 | 0.50 |
玉米 | 13.23 | 35.02 | 7.90 | 9.83 | -3.47 | 13.27 | 0.60 | 0.28 |
其他粮食作物 | 11.97 | 21.52 | 7.40 | 8.06 | -2.00 | 4.99 | 0.62 | 0.37 |
大豆 | 48.16 | 30.39 | 10.59 | 10.63 | 30.52 | 11.21 | 0.22 | 0.35 |
其他油料作物 | 20.19 | 27.97 | 9.32 | 11.40 | 3.66 | 6.70 | 0.46 | 0.41 |
糖料作物 | 51.64 | 117.06 | 29.39 | 31.54 | 13.90 | 75.28 | 0.57 | 0.27 |
块茎作物 | 30.42 | 44.02 | 11.39 | 12.44 | 11.08 | 21.66 | 0.37 | 0.28 |
蔬菜 | 24.53 | 27.09 | 9.93 | 12.51 | 12.72 | 11.04 | 0.40 | 0.46 |
水果 | 50.79 | 130.48 | 1.87 | 3.10 | 47.04 | 123.85 | 0.04 | 0.02 |
其他作物 | 71.62 | 80.42 | 11.82 | 13.68 | 58.06 | 63.32 | 0.17 | 0.17 |
合计 | 36.14 | 43.93 | 11.75 | 12.84 | 18.21 | 23.07 | 0.33 | 0.29 |
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