Substitution of inorganic fertilizers with organic manure reduces nitrate accumulation and improves quality of purslane

Iranian Journal of Plant Physiology

مقاله 7، دوره 9، شماره 1، دی 2018، صفحه 2651-2660   

نوع مقاله: Original Article

شناسه دیجیتال (DOI): 10.30495/ijpp.2018.545667

نویسندگان

Sina Fallah^{* 1}؛ Behjat Omrani²

¹Department of Agronomy, Shahrekord University

²Faculty of Agriculture, Shahrekord University, Iran

چکیده

Growers often apply high amounts of chemical fertilizers for vegetable production and this application contributes to concerns about nitrate levels in food. An experiment was conducted to investigate soil N amendment effects for reducing the nitrate accumulation and improving the quality of fresh purslane (Portulaca oleracea L.). Treatments included four levels of animal manure as follows, N-based broiler litter (T₁), P-based broiler litter (T₂), N-based cattle manure (T₃), P-based cattle manure + urea (T₄), four levels of chemical fertilizer equivalent to organic treatments, and a T₀ (no fertilizer and manure). Results showed that nitrate levels of broiler litter and cattle manure treatments were significantly lower than those of chemical fertilizer treatments. The highest level of nitrate in the first harvest was recorded in the T₇ treatment and higher levels were recorded in T₅ and T₇ treatments in the second harvest. In the first harvest, T₁ and T₂ treatments had higher appearance quality but in the second harvest, appearance quality of T₂ and T₅ treatments showed a significant increase compared to the other treatments. It is concluded that organic manure application results in higher quality as compared with the inorganic fertilizer andreduces nitrate accumulation in fresh purslane.

کلیدواژه‌ها

broiler litter؛ fresh vegetable؛ Nitrate؛ Portulaca oleracea L

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