Effect of Organic and Inorganic Nutrients for Soil Quality Conservation and Yield of Rainfed Low Land Rice in Sub‐tropical Plateau Region

Abstract

The effect of organic sources of nutrients and inorganic fertilizers, was studied on grain yield of lowland rice and some aspect of soil quality parameters in a field experiment at Agricultural Experimental Farm of Indian Statistical Institute, Giridih, situated at eastern plateau region of India, during consecutive years 1997-2002. Chemical fertilizers and various organic matters were applied to two rice cultivars, Sabita and Subarna. The highest mean grain yield was 3.53 t ha )1 and maximum agronomic efficiency was 60.3 % with the application of inorganic fertilizer followed by cow dung, where 3.47 t ha )1 grain yield was recorded with an agronomic efficiency of 57.5 %. Grain yield of rice recorded under organic sources of nutrients was not significantly different from that of inorganic fertilization though there was improvement in soil quality parameters under organic sources. Soil organic carbon (0.72 %), microbial biomass-C (279.23 lg g )1 dry soil), urease activity with buffer (33.54 lg urea hydrolyzed g )1 oven-dry soil) and nonbuffer (21.97 lg urea hydrolyzed g )1 of oven-dry soil) methods and acid phosphatase activity (2.24 lg paranitrophenol released g )1 of oven-dry soil) analysed following the harvest of the crop were highest under cow dung manure treatment; the most efficient organic source under the experiment. Mean grain yield of rice was significantly higher in Sabita cultivar over Subarna. The regression analyses among the variables have shown that there was linear relationship among soil parameters and grain yield of rice.

Effect of Repeated Application of Manure on Herbage Yield, Quality and Wintering Ability during Cropping of Dwarf Napiergrass with Italian Ryegrass in Hilly Southern Kyushu, Japan

“…Manure's advantages as a slow-releasing fertilizer lead to higher DM yield of DL Napiergrass [37]. In the present study, even though fertilizer treatments were not imposed in the last year, higher yield was achieved in the organic fertilizer plots-especially in the LM plot, which achieved the highest DM yield at 22 Mg ha −1 across all plots and years (Figure 1).…”

Phosphorus fixing capacity of a volcanic soil on the slope of mount Cameroon

“…Organic molecules released on decomposition of organic matter form complexes with Fe and Al in the soil thereby blocking the sites which are mainly responsible for fixation of phosphorus in the soil (Juo and Fox, 1977;Subramanian and Kumaraswamy, 1989;Brouwere et al, 2003;Ghosal et al, 2011). Banik et al (2006) also showed that addition of organic manure markedly increased the availability of phosphorus in the soil. This increase in phosphorus availability in the soil was found to be statistically significant over control treatment and also over treatments with inorganic fertilizers.…”

Effect of Nutrient Management and Planting Geometry on Productivity of Hybrid Rice (<i>Oryza sativa</i> L.) Cultivars

“…The yield advantage on the application of organic sources is due to their capability to supply essential nutrients other than N, P and K. Application of farm yard manure is known to increase concentrations of Fe, Mn, Zn, and Cu in rice. Higher nutrients uptake with the application of inorganic fertilizer might be due to higher nutrient concentration along with higher biomass production [22,23]. Application of organic manure along with chemical fertilizer accelerates the microbial activity [24], increases nutrients use efficiency [25] and enhances the availability of the native nutrients to the plants resulting higher nutrients uptake [26].…”