PJB-2019-727
Nutrient dynamics in urban and peri-urban farming system under semi-arid conditions
Shoaib Ur Rehman
Abstract
Little has been done to evaluate the externalities and manageability of urban and peri-urban horticultural (UPA) production frameworks in Faisalabad. To fill this significant gap, a two-year experimentation (2011-2012) was conducted to assess the quantity of carbon (C), nitrogen (N), phosphorus (P), and potassium (K) at selected sites with their three types of irrigation system sources wastewater (WW), mix water (MW), and channel water (CW). An aggregate of 26 vegetables, 14 cereal crops and 13 fodder producing locales were picked for flux estimations. In WW, MW, and CW cultivating systems biennial leaching losses estimated about 102 kg, 46kg and 27 kg N ha-1, 15 kg, 12 kg and 7 kg P ha-1, and 95 kg, 59 kg and 34 kg ha-1 K ha-1, individually. Total nutrient input use effectiveness across cultivating systems stayed 93% for N, 54% for P and 345% for K individually. In WW systems, irrigation water was the huge source of P and K with 80% of total inputs while in CW framework 75% of total N originated from mineral fertilizers. The trial results show enormous K mining in WW cultivating systems which even on the K-rich examination soils may in the long run require appropriate adjusting.
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