بررسی میزان گسیل گازهای CH4، N2O و NO از اراضی کشاورزی (مطالعه موردی: استان خوزستان)

نوع مقاله : مقاله پژوهشی


1 دانشگاه حکیم سبزواری

2 گروه جغرافیا، دانشکده جغرافیا و علوم محیطی، دانشگاه حکیم سبزواری، سبزوار، ایران

3 دانشگاه چمران اهواز


هدف از پژوهش حاضر برآورد شار گازهای CH4، N2O و NO در اراضی کشاورزی خوزستان شامل محصول مرکبات،گندم، خرما، نیشکر و برنج با استفاده از نرم افزار DAYCENT است. در ابتدا نمونه‌برداری و تعیین غلظت گاز خروجی در هر واحد زراعی انجام شد و سپس با استفاده از نرم‌افزار DAYCENT انتشار گازهای مذکور در ایستگاه‌های مورد مطالعه شبیه‌سازی گردید. مطابق نتایج، بیشترین میزان انتشار N2O از خاک در گندمزارهای شوش (101/0 تن در هکتار در سال) و کمترین میزان در مزارع کشت و صنعت‌ نیشکر شوشتر (002/0 تن در هکتار در سال) بوده است. متناظرا بیشترین میزان گسیل گاز NO از خاک در باغات مرکبات دزفول (152/0 تن در هکتار در سال) و کمترین در کشت و صنعت‌های نیشکر شوشتر (004/0 تن در هکتار در سال) تعیین شد. همچنین برای گاز متان بیشترین مقدار در شالیزارهای باغملک (369/1 تن در هکتار در سال) و کمترین در کشت و صنعت‌های نیشکر آبادان (120/0 تن در هکتار در سال) برآورد شد. با توجه به نقش بخش کشاورزی در گسیل گازهای گلخانه ای، استمرار پژوهش‌های مشابه در سایر مناطق کشور توصیه می‌شود.



عنوان مقاله [English]

Evaluation of CH4, NO and NO2 emission from agricultural lands (Case study, Khuzestan province)

نویسندگان [English]

  • nasrin moradimajd 1
  • Gholamabbas Fallah Ghalhari 2
  • Mansour Chatrenour 3
1 department of hakim sabzevari university
2 Department of Geography, Faculty of Geography and Environmental Sciences, Hakim Sabzevari University, Sabzevar, Iran
3 Department of Chamran university of Ahvaz
چکیده [English]

The purpose of this study is estimation of CH4, N2O and NO emission from agricultural lands, including citrus, wheat, date, sugarcane and rice in Khuzestan province, Iran. The actual concentration of each gas was determined by sampling from study sites. The DAYCENT model was used to simulate corresponding values of emission from each farm in selected sites. According to results, the highest and lowest annual amount of N2O emission were obtained in wheat and sugarcane farms of Shooshtar, 0.10 t.ha-1 and 0.002 t.ha-1, respectively. Similarly, the highest and lowest amounts of NO emission were observed in citrus orchards of Dezful and Shooshtar sugarcane fields, i.e. 0.152 and 0.004 t/ha, respectively. Average CH4 emission was highest for the paddy fields of Baghmalek and lowest in Abadan sugarcane farms with 1.369 and 0.12 t.ha-1.year-1, respectively. Considering the major contribution of agriculture in emission of greenhouse gasses, further studies in other regions of the country is recommended.

کلیدواژه‌ها [English]

  • Khuzestan Province
  • Greenhouse gasses
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