کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8959593 1646329 2018 29 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Soil and onsite nutrient conservation potential of aromatic grasses at field scale under a shifting cultivated, degraded catchment in Eastern Ghats, India
ترجمه فارسی عنوان
پتانسیل حفاظت از مواد مغذی خاک و در معرض چاودارهای معطر در مقیاس حوزه تحت یک تغییر آبشاری کشت شده، تخریب شده در غلات شرقی هند
کلمات کلیدی
چمن آروماتیک، نسبت غنی سازی، از دست دادن غذا، رواناب عملکرد رسوب،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی
Land degradation due to soil erosion is a global problem, especially on cultivated hill slopes. Economically important aromatic grasses can protect degraded hill slopes more effectively than field crops, but little information is available on their performance. This study quantifies runoff, sediment yield, enrichment ratios of soil and nutrients, and sediment-associated organic carbon and nutrients losses under three aromatic grass species: citronella (Cymbopogon nardus), lemon (Cymbopogon flexuosus), and palmarosa (Cymbopogon martini), compared with a traditional field crop, finger millet (Eleusine coracana) grown at three land slopes (4%, 8%, and 12%). It was observed that the degree of slope and type of grass both significantly influenced runoff generation. Runoff and sediment yield (SY) were significantly higher at 12% slope than at 8% and 4% slopes. Relation between rainfall and runoff were significant for all the grass species (p < 0.05). Palmarosa, lemon, and citronella grass reduced the SY by 10, 54, and 60%, respectively, over finger millet. SY was also significantly related to rainfall for all the treatments (p < 0.05). The threshold runoff values to produce SY were higher for aromatic grasses compared to finger millet. Enrichment of clay, silt, sand, soil organic carbon (SOC), available nitrogen (N), phosphorus (P) and potassium (K) in the sediment were not significantly different between slopes but differed significantly between aromatic grasses and finger millet. Sediment associated nutrient load varied inversely with SY mainly because of the nutrient dissolution effect of high runoff volume. Annual loss of SOC and nutrients varied from 84.7-156.8 kg ha-1 y-1 for SOC, 4.38-9.18 kg ha-1 y-1 for available N, 0.35-0.75 kg ha-1 y-1 for available P, and 2.22-5.22 kg ha-1 y-1 for available K, with the lowest values for citronella and highest for finger millet. The study found that the aromatic grasses have greater environmental conservation values than finger millet on steep degraded land.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Sediment Research - Volume 33, Issue 3, September 2018, Pages 340-350
نویسندگان
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