Organic materials from various sources have been commonly adopted as soil amendments to improve crop productivity. Phosphorus deficiency and fixation in alkaline calcareous soils drives a reduction in crop production. A two-year field experiment was conducted to evaluate the impact of rock phosphate enriched composts and chemical fertilizers both individually and in combination with plant growth promoting rhizobacteria (PGPR) on wheat productivity and soil chemical and biological and biochemical properties. The present study demonstrates significant increments in crop agronomic and physiological parameters with Pseudomonas sp. inoculated RPEC₁ (rock phosphate + poultry litter + Pseudomonas sp.) over the un-inoculated untreated control. However, among all other treatments i.e., RPEC₂ (rock phosphate + poultry litter solubilized with Proteus sp.), RPC (rock phosphate + poultry litter), HDP (half dose inorganic P from Single Super Phosphate-SSP 18% P₂O₅) and SPLC (poultry litter only); RPEC₁ remained the best by showing increases in soil chemical properties (available phosphorus, nitrate nitrogen, extractable potassium), biochemical properties (alkaline phosphatase activity) and biological properties (microbial biomass carbon and microbial biomass phosphorus). Economic analysis in terms of Value Cost Ratio (VCR) showed that the seed inoculation with Pseudomonas sp. in combination with RPEC₁ gave maximum VCR (3.23:1) followed by RPEC₂ (2.61:1), FDP (2.37:1), HDP (2.05:1) and SPLC (2.03:1). It is concluded that inoculated rock phosphate (RP) enriched compost (RPEC₁) can be a substitute to costly chemical fertilizers and seed inoculation with Pseudomonas sp. may further increase the efficiency of composts.

中文翻译：

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富含岩石磷酸盐的堆肥与根瘤菌的结合；改善土壤健康和小麦生产力的成本有效来源

来自各种来源的有机材料通常被用作土壤改良剂，以提高农作物的生产力。碱性钙质土壤中的磷缺乏和固着会导致农作物减产。进行了为期两年的田间试验，以评估富含磷酸岩的堆肥和化肥的单独作用，以及与植物促生根瘤菌（PGPR）联合使用对小麦生产力以及土壤化学和生物化学特性的影响。本研究表明假单胞菌sp。Pseudomonas sp。的农艺和生理参数显着增加。接种RPEC ₁（磷酸盐岩+家禽垃圾+假单胞菌）未接种的未处理对照）。但是，在所有其他处理方法中，例如RPEC ₂（磷酸盐岩石+用Proteus sp。溶解的家禽垃圾），RPC（磷酸盐岩石+家禽垃圾），HDP（来自单一超级磷酸盐SSP的半剂量无机P 18％P ₂ O _5））和SPLC（仅用于家禽垫料）；RPEC ₁通过显示土壤化学性质（可利用的磷，硝酸盐氮，可提取的钾），生化性质（碱性磷酸酶活性）和生物学性质（微生物生物量碳和微生物生物量磷）增加而保持最佳状态。根据价值成本比（VCR）进行的经济分析表明，接种假单胞菌后可接种种子sp。与RPEC ₁组合使用可提供最大的VCR（3.23：1），然后是RPEC ₂（2.61：1），FDP（2.37：1），HDP（2.05：1）和SPLC（2.03：1）。结论是，接种磷酸盐岩（RP）的堆肥（RPEC ₁）可以替代昂贵的化肥和假单胞菌（Pseudomonas sp）的种子接种。可能会进一步提高堆肥的效率。