Integrated Nutrient Management, Concept and Application in Citrus in Southeast Asia
Citrus is one of the premier fruit crops, grown worldover under diverse agrosystems. Long term evaluation of different organic manures viz. , farmyard manure, poultry manure, vermicompost versus green manuring (Crotolaria junea) showed improvement in organic carbon from 5.10 to 6.40 g/kg versus 5.80 to7.40g/kg, respectively, suggesting an urgent need to dwell upon differential quasi-equilibrium (critical limit) of organic carbon in different soil types to harness the indigenous soil microbial diversity. Evaluation of colemanite (Trade name Agricol and calcium borate as active ingredient mined naturally in Turkey) at 150g/(tree. year) as soil application further showed vast improvement in tree volume, fruit yield and quality of Nagpur mandarin in central India with significant changes in available pool soil B, fitting well into the objectives of organic citriculture. These observations have lent a possibility of using changes in microbial biomass as a potential diagnostic tool of fertility measurement. These later formed the basis for INM (integrated nutrient management)-based nutrient management involving three basic components viz. , microbial inoculants (biofertilizers), inorganic fertilizers, and organic fertilizers. INM module, using combination of recommended doses of fertilizers (600 — 800g N-200g P-300g K -200g/tree ZnSO4)
Citrus Microbial inoculation Manures Inorganic fertilizers Substrate Integrated nutrient management
A. K. Srivastava
National Research Centre for Citrus, P. 0. Box. No. 464, Shankarnagar P. 0. Amravati Road, Nagpur 440 010,Maharashtra, INDIA
国际会议
11th International Citrus Congress(第11届国际柑橘大会)
武汉
英文
726-733
2008-10-01（万方平台首次上网日期，不代表论文的发表时间）