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应用生态学报 ›› 2018, Vol. 29 ›› Issue (11): 3658-3668.doi: 10.13287/j.1001-9332.201811.022

• 研究报告 • 上一篇    下一篇

绿洲灌区典型种植模式的水热利用与碳排放和能值分析

殷文, 柴强*, 樊志龙, 胡发龙, 赵财, 于爱忠   

  1. 甘肃省干旱生境作物学重点实验室/甘肃农业大学农学院, 兰州 730070
  • 收稿日期:2018-03-14 出版日期:2018-11-20 发布日期:2018-11-20
  • 通讯作者: *E-mail: chaiq@gsau.edu.cn
  • 作者简介:殷 文,男,1988年生,博士,讲师. 主要从事多熟种植及节水农业研究. E-mail: yinwen@gsau.edu.cn
  • 基金资助:

    本文由国家自然科学基金项目(31771738, 31360323)资助

Emergy analysis, water-heat utilization, and carbon emission of typical cropping patterns in the oasis irrigation area.

YIN Wen, CHAI Qiang*, FAN Zhi-long, HU Fa-long, ZHAO Cai, YU Ai-zhong   

  1. Gansu Provincial Key Laboratory of Arid Land Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2018-03-14 Online:2018-11-20 Published:2018-11-20
  • Contact: *E-mail: chaiq@gsau.edu.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (31771738, 31360323).

摘要: 合理的种植模式可以提高资源利用效率,降低农业生产的生态环境风险,实现资源节约和增产增效的目的.本文运用能值分析的理论和方法,从资源利用、碳排放、经济效益、能值自给率和净能值产出率等方面对干旱灌区典型种植模式的生产效应进行综合分析与评价,以期为建立减投、减排、高产高效、可持续农田高效生产模式提供理论与实践依据.结果表明:集成免耕秸秆覆盖还田及地膜再利用的高效间作生产模式(NTSI)具有明显的增产效应,与地方传统间作(CTI)和单作玉米(CTM)相比,分别增产13.5%~16.9%和13.8%~17.1%.NTSI较CTI模式水分利用效率和光能利用率分别提高12.4%~17.2%和6.1%~8.1%.高效NTSI模式可降低系统碳排放、提高碳排放效率,与CTI和CTM相比,碳排放总量分别降低618~895和1804~2002 kg·hm-2,降低幅度分别为12.1%~16.4%和28.6%~31.0%;相反,碳排放效率分别提高29.3%~40.1%和58.9%~71.4%.高效NTSI模式具有明显的资源减投潜力,与CTI和CTM相比,总投入分别降低1424~1431和501~1547 元·hm-2,减投比例分别为12.6%~13.6%和4.9%~14.6%;总产值分别提高11.2%~11.8%和24.4%~36.3%(增加4309~4603和8439~11057元·hm-2);纯收益分别增加19.6%~22.4%和40.1%~57.7%(增多5740~6027和9544~11558元·hm-2).因而,NTSI模式具有较高的产投比和单方水效益,与CTI和CTM相比,产投比分别提高27.9%~29.0%和40.5%~45.6%;单方水效益提高幅度分别达到19.9%~23.2%和27.7%~39.3%.高效NTSI模式能值自给率达到57.2%,较CTI和CTM生产模式分别提高4.0%和12.2%,NTSI模式净能值产出率达到0.173,较CTI高10.0%,但比CTM低11.7%.从资源利用、碳减排、经济效益、可持续发展角度综合考虑,集成免耕秸秆覆盖还田及地膜两年利用的高效小麦间作玉米模式具有较高的经济活力,农业系统整体功能较好,运转效率较高,能值回报率较高,是适用于干旱绿洲灌区的资源减投、减排、高产高效的种植模式.

Abstract: Reasonable cropping pattern can improve resource utilization efficiency, reduce environmental risks in agricultural production, and achieve the goal of resource saving coupled with high production and efficiency. We evaluated the production effects of typical cropping patterns in an arid irrigation region from several aspects, including resource utilization, carbon emissions, economic benefit, emergy self-sufficiency ratio and net emergy yield ratio, with the method of emergy theory, to provide theoretical and practical basis for the establishment of efficient cropping with lower resource investment and carbon emissions but higher yield and resource utilization efficiency combined with the sustainability of agricultural production. The results showed that, high-efficient wheat-maize intercropping production pattern (integration of no tillage with 25 to 30 cm height of wheat straw covering in the wheat strip and two-year plastic mulching in the maize strip, NTSI) had the best performance in grain yield boosting, with the yields 13.5% to 16.9% and 13.8% to 17.1% higher than that in local traditional production patterns (i.e., wheat-maize intercropping, CTI, and monoculture maize, CTM), respectively. Moreover, NTSI increased water use efficiency and solar energy use efficiency by 12.4% to 17.2% and 6.1% to 8.1%, compared to CTI, respectively. Compared to CTI and CTM, NTSI improved the effect on carbon emission reduction by decreasing total soil CO2 emission by 618 to 895 kg·hm-2 and 1804 to 2002 kg·hm-2 with the ratio of 12.1% to 16.4% and 28.6% to 31.0%, but increased carbon emission efficiency by 29.3% to 40.1% and 58.9 to 71.4%, respectively. Meanwhile, the NTSI pattern had obvious resources saving potential. Compared with CTI and CTM, NTSI reduced total input by 1424 to 1431 yuan·hm-2 and 501 to 1547 yuan·hm-2, with the proportional reduction being 12.6% to 13.6% and 4.9% to 14.6%; however, increased total output by 4309 to 4603 yuan·hm-2 and 8439 to 11057 yuan·hm-2, the increased ratio was 11.2% to 11.8% and 24.4% to 36.3%; also, increased net return by 5740 to 6027 yuan·hm-2 and 9544 to 11558 yuan·hm-2, and the improved percentage was 19.6% to 22.4% and 40.1% to 57.7%, respectively. Therefore, the high-efficient NTSI pattern had greater input-output ratio by 27.9% to 29.0% and 40.5% to 45.6% than CTI and CTM, respectively, similarly, greater benefit per cubic meter of water by 19.9% to 23.2% and 27.7% to 39.3%, respectively. The emergy self-sufficiency ratio of NTSI pattern was 57.2%, being 4.0% and 12.2% higher than CTI and CTM, respectively. NTSI pattern’s net emergy yield ratio was 0.173, being 10.0% greater than CTI but 11.7% lower than CTM. With respect to resource utilization, carbon emission reduction, economic benefits and the sustainable development of high-efficient intercropping pattern, the integration of no tillage with straw covering and two-year plastic film mulching measures had higher economic activity, better function of agricultural system, greater production efficiency, and higher returns on energy value. We concluded that NTSI could be a high-efficiency farming system pattern on resources saving, carbon emission reduction, high yield and efficiency in arid oasis irrigation areas.