کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6406969 1628803 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Accelerated phosphorus accumulation and acidification of soils under plastic greenhouse condition in four representative organic vegetable cultivation sites
ترجمه فارسی عنوان
تجمع فسفر سریع و اسیدی شدن خاک در شرایط گلخانه ای پلاستیکی در چهار محل نمایندگی کشت سبزیجات ارگانیک
کلمات کلیدی
تجمع فسفر، اسیدی شدن خاک، کشاورزی ارگانیک، خاک های گیاهی، گلخانه پلاستیکی،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش باغداری
چکیده انگلیسی


- Phosphorus accumulation and soil acidification were found to be more severe in PGVS than in OVS.
- Soil T-Pi accounted for 65.6-96.7% of TP in vegetable soils.
- Soil total P and available P were both correlated with soil pH.
- Al-P/Fe-P ratio was also correlated with vegetable soil pH.
- The amount, form and transformation of soil total Pi may affect soil pH.

Organic vegetable cultivation under plastic greenhouse conditions is expanding rapidly in the suburb of big cities in China due to the increasing demand for organic, out-of-season green vegetables and the sustainable development of agriculture. Phosphorus (P) is not only an important plant nutrient, but also a major contaminant in the water environment. However, information on the accumulation and distribution of P in organic vegetable soils under plastic greenhouse conditions is limited, relative to the open cultivation systems. Therefore, twenty-six plastic greenhouse vegetable soils (PGVS) were selected randomly from four representative organic vegetable cultivation sites located in the suburb of Nanjing, China. For comparison, 15 open vegetable soils (OVS) near the PGVS with similar soil and cultivation practices were selected. Soil pH, organic matter (OM) and the various P accumulation characteristics were investigated. We found that soil pH in PGVS were significantly decreased by 0.57-1.17 unit with obvious signs of acidification, compared with that in OVS. Soil OM was different for different sampling locations, but in general it was higher in PGVS than OVS. Soil total P (TP), inorganic P (Pi) and Olsen-P of PGVS were higher than those in the OVS. Olsen-P of all soil samples were far above the recommended optimum value of 20 mg kg−1 for field crops, and over 60% soil samples were considered excessive (>150 mg kg−1) in the PGVS and OVS. There were significant correlations between total P, available P and soil pH in those vegetable soils. Al-P/Fe-P ratio was also significantly correlated with vegetable soil pH (YpH = 7.44-1.32 XAl-P/Fe-P, r = − 0.705, p < 0.01). Soil total Pi was negatively correlated with soil pH in vegetable soils (r = −0.328, p < 0.05), but the interactive effect of soil various Pi and soil pH need to be further investigated through a series of controlled tests. Our results suggest that the rapid P accumulation and acidification make the current plastic greenhouse vegetable production in the study area unsustainable and better organic manure management practices need to be implemented to sustain crop yields while minimizing the impact of vegetable production on the environment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Scientia Horticulturae - Volume 195, 12 November 2015, Pages 67-73
نویسندگان
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