Strategies for Phosphorus Nutrition of Dryland Wheat in Pakistan


Rashid A., Awan Z. I. , Ryan J., Rafique E., İBRİKÇİ H.

COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, cilt.41, ss.2555-2567, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 41 Konu: 21
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1080/00103624.2010.514374
  • Dergi Adı: COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
  • Sayfa Sayısı: ss.2555-2567

Özet

Phosphorus (P) is an endemic soil constraint to crop production in rainfed semi-arid regions like the 1.82-Mha Pothohar Plateau in Pakistan, where we monitored the P status of rainfed wheat (Triticum aestivum L.) and determined crop responses to P application by broadcast and banding methods. Nutrient indexing of young whole shoots and associated soils revealed severe to moderate P deficiency in most fields. In a 3-year field trial on P-deficient soils, grain yield increases were 130-233% with broadcast and 175-239% with banded P; fertilizer requirement for optimum crop yield was twice as high for broadcasting than banding. Fertilizer use was highly profitable, especially with banding, and increased both available soil P and organic matter. This comprehensive approach of soil-plant nutrient indexing and selective field trials provided a rational economic basis for P fertilizer use in rainfed agriculture and serves as a model strategy for stimulating crop productivity in developing countries.