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بررسی اثرات تجهیز و نوسازی اراضی شالیزاری بر برخی ویژگی های فیزیکی خاک در منطقه لشت نشاء | ||
تحقیقات آب و خاک ایران | ||
دوره 52، شماره 9، آذر 1400، صفحه 2373-2381 اصل مقاله (1.07 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijswr.2021.326814.669018 | ||
نویسندگان | ||
معصومه ایزد پناه1؛ محمود شعبانپور شهرستانی* 2؛ سپیده ابریشم کش3؛ ایرج باقری4 | ||
1دانش آموخته کارشناسی ارشد، گروه علوم خاک، دانشکده کشاورزی، دانشگاه گیلان، رشت، ایران | ||
2دانشیار گروه خاکشناسى، دانشکده کشاورزى، دانشگاه گیلان، رشت | ||
3گروه خاکشناسی - دانشگاه گیلان- استادیار | ||
4گروه مکانیزاسیون کشاورزی ، دانشکده کشاورزی، دانشگاه گیلان، رشت، ایران | ||
چکیده | ||
طرح تجهیز و نوسازی اراضی، یک راهکار حفاظتی جهت ایجاد شیب یکنواخت جهت یکپارچهسازی، تسهیل آبیاری و زهکشی اراضی شالیزاری است. علیرغم اثرات مثبت این طرح موجب تخریب ویژگیهای فیزیکی خاک میشود. هدف این پژوهش بررسی اثرات تجهیز و نوسازی اراضی بر ویژگیهای فیزیکی خاک میباشد، این کار با مقایسه اراضی سنتی و تجهیز شده، دو منطقه بالاگفشه و لیموچاه در منطقه لشت نشاء استان گیلان که به ترتیب دو و پنج سال است که از زمان تجهیز و نوسازی آن گذشته است انجام شد. تعداد 20 نمونه به روش شبکهای به ابعاد 20×20 متر از عمق 20-0 سانتیمتر از هر زمین و در مجموع 80 نمونه برداشته شد. درصد شن، سیلت و رس، جرم مخصوص ظاهری، میانگین وزنی قطر خاکدانهها، رطوبت اشباع خاک، مقاومت فروروی و کربن آلی اندازه گیری شد. مقایسه میانگین با استفاده از آزمون t نمونههای مستقل و نرم افزار SPSS انجام شد. نتایج مقایسه میانگین بیانگر افزایش معنی دار درصد رس، جرم مخصوص ظاهری، مقاومت فروروی در اراضی تجهیز شده لیموچاه بود، لیکن در منطقه بالاگفشه نتایج عکس آن مشاهده شد. به طورکلی نتایج بیانگر آن بود که تغییرات ناشی از تجهیز و نوسازی اراضی مانند تغییر توزیع اندازه ذرات، تخریب ساختمان و تراکم خاک بدون اعمال مدیریت مناسب پس از اجرای طرح و تنها با تکیه بر نقش عامل زمان به برگشتپذیری ویژگیهای خاک تعدیل نمیگردد. اعمال مدیریت مناسب مانند کشت گیاهان پوششی و بازگرداندن آن به خاک مانند منطقه بالاگفشه میتواند موجب بهرهبرداری از منافع طرح یکپارچهسازی اراضی شود و اثرات مخرب حاصل از آن را هم کنترل کند. | ||
کلیدواژهها | ||
ساختمان خاک؛ خاکبرداری؛ کشت برنج؛ یکپارچه سازی اراضی | ||
عنوان مقاله [English] | ||
Investigating the Effects of Land Leveling on Some Physical Properties of Soil in Lasht-e Nasha Region | ||
نویسندگان [English] | ||
Masoomeh Izadpanah1؛ Mahmoud Shabanpour2؛ Sepideh Abrishamkesh3؛ Iraj Bagheri4 | ||
1Department of Soil Science, Faculty of Agriculture, University of Guilan | ||
2Department of Soil Science, University of Guilan | ||
3Department of Soil Science, Faculty of Agriculture, University of Guilan | ||
4Department of Agricultur Mechanization Engineering, Faculty of Agriculture, University of Guilan | ||
چکیده [English] | ||
Land leveling is a conservation solution to create a uniform slope to integrate, facilitate irrigation and drainage of paddy lands. Despite the positive effects of land leveling, it destroys the physical properties of the soil. The purpose of this study was to investigate the impact of land leveling on the physical characteristics of the soil. This work compares traditional and leveled lands, Balagafsheh and Limuchah areas, which have been leveled for two and five years, respectively. A total of 80 samples were taken, 20 soil samples from each traditional and land leveled plot in the two areas at depth of 0-20 cm by a grid method with dimensions of 20 by 20 meters. Mean comparison was performed using an independent t-test and SPSS software. The results of comparing the mean showed a significant increase in the percentage of clay, bulk density, penetration resistance in the leveled lands of Limuchah, but in Balagafsheh area, the opposite results were observed. In general, the results indicated changes due to land leveling, such as changes in particle size distribution, structure destruction, and soil compaction without proper management after the implementation of the project, and the reversibility of soil properties is not adjusted solely by relying on the role of the time factor.. Proper management practices such as growing cover crops and returning them to the soil, such as the Balagafsheh area, can exploit the benefits of the land consolidation plan and control the destructive effects of it. | ||
کلیدواژهها [English] | ||
soil structure, excavation, rice cultivation, land integration | ||
مراجع | ||
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