Abstract
Field experiments were conducted at Tamil Nadu Agricultural University, Coimbatore during rabi and summer seasons of 2007-2008 and 2008-2009 to study the influence of organic manures (enriched farmyard manure compost, vermicompost, farmyard manure + neem cake, enriched farmyard manure compost + vermicompost + farmyard manure, composted poultry manure and enriched poultry manure compost) and recommended NPK fertilizers on yield and quality of rice and blackgram in rice-blackgram cropping sequence. Based on field experiments, it was found that the application of enriched poultry manure compost on equal N basis (2.3 t·ha-1) recorded higher yield attributes and grain yield of rice (4675 kg·ha-1 in 2007 and 4953 kg·ha-1 in 2008), which was however comparable with composted poultry manure. The application of recommended NPK fertilizers recorded higher physical characteristics and cooking qualities of rice, which was comparable with enriched poultry manure compost. Higher sensory score was registered in enriched poultry manure compost as compared to recommended NPK through fertilizers. After harvesting of rice, the residual effect of enriched poultry manure compost and composted poultry manure applied to preceding rice crop improved yield attributes and yield of succeeding blackgram.
Highlights
Rice (Oryza sativa L.) is the most important and extensively cultivated food crop, which provides half the daily food for one of every three persons on the earth
Field experiments were conducted at Tamil Nadu Agricultural University, Coimbatore during rabi and summer seasons of 2007-2008 and 2008-2009 to study the influence of organic manures and recommended NPK fertilizers on yield and quality of rice and blackgram in rice-blackgram cropping sequence
It was found that the application of enriched poultry manure compost on equal N basis (2.3 t·ha−1) recorded higher yield attributes and grain yield of rice (4675 kg·ha−1 in 2007 and 4953 kg·ha−1 in 2008), which was comparable with composted poultry manure
Summary
Rice (Oryza sativa L.) is the most important and extensively cultivated food crop, which provides half the daily food for one of every three persons on the earth. The cropping sequence of rice-pulse is practically feasible, viable, economical, eco-friendly, water saving technology for sustaining soil fertility and rice productivity. Increased use of inorganic fertilizers in crop production deteriorates soil health, causes health hazard and insecurity of quality food. Awareness about crop quality and soil health increased the attention of people towards organic farming [1]. Balanced use of nutrients through organic sources like farmyard manure, vermicompost, green manuring, neem cake and biofertilizers are prerequisites to sustain soil fertility, to produce maximum crop yield with optimum input level [2]. In view of the above facts, field experiment on “Influence of organic manures on yield and quality of rice and blackgram in rice-blackgram cropping sequence” was conducted with the following objectives. 1) To study the influence of different sources of organic manures on yield of rice and their residual effect on succeeding blackgram; 2) To know the effect of organic manuring on quality of rice grain
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