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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Jul 2017, 38 (4)                                                                                                             Back



nstantaneous and historical temperature effects on a-pinene

Effect of sulphur on soil biological properties, residual fertility

and yield of aerobic rice grown under aerobic rice-wheat cropping system in Inceptisols

 

A. Ram1*, D. Kumar2, S. Babu3, D. Prasad4 and I. Dev1

1ICAR-Central Agroforestry Research Institute, Jhansi-284 003, India

2Division of Agronomy, Indian Agricultural Research Institute, New Delhi-110 012, India

3ICAR Rersearch Complex for NEH region, Sikkim Centre, Tadong-737 102, India

4Agriculture Research Station, Swami Keshwanand Rajasthan Agricultural University,? Sriganganagar-335 001, India

*Corresponding Author E-mail: ashusirvi84@gmail.com

 

 

 

Key words

Gypsum,

Microbial biomass,

Phosphogypsum,

Rice yield,

Soil fertility

 

 

 

Publication Data

Paper received : 17.02.2016

Revised received : 08.07.2016

Re-revised received : 09.10.2016

Accepted : 05.11.2016

 

Abstract

Aim: Rice productivity is stagnant or declining due to imbalanced nutrition, including deficiency of sulphur. In India about 44% soils (out of total cultivated land) is sulphur deficient. Various sources of sulphur fertilizers are available, but gypsum and phosphogypsum can be better options for the farmers. The main aim of this study was to improve the soil fertility, soil microbial properties and rice yields with application of sulphur.

 

Methodology: The combination of two sulphur sources (gypsum & phosphogypsum) at two levels i.e., 30 and 60 kg ha-1 and control (no S) were applied to rice crop and three levels of? sulphur (elemental sulphur) i.e., 0, 15 and 30 kg S ha-1 were applied to succeeding wheat grown under rice-wheat cropping system. Microbial biomass carbon and microbial activities in terms of Fluorescein Diacetate (FDA) hydrolysis, Dehydrogenase and Arylsulphatase activity were estimated in different treatments by standard procedures. Organic carbon, N, P, K and S were estimated for residual fertility after harvest of rice crop. Rice grain yield was recorded at 14% moisture content.

 

Results: Direct and residual effect of sulphur application increased the wheat grain and straw yield. Sulphur application increased 8.2 to 12.8% (microbial biomass carbon), 16.9 to 32.3% (arylsulphatase activity) and 8.7 to 11.2% (rice grain yield). Available N and P in soil were observed higher in control (no sulphur) than the other sulphur treatments. However, sulphur status after two years of cropping system was improved by 6.4, 12.7, 5.2 and 9.7% with sulphur application through gypsum @ 30 and 60 kg S ha-1; phosphogypsum @ 30 and 60 kg S ha-1, respectively. ?

 

Interpretation: Sulphur is also essential as microbial-S for the micro-organism. Hence, sulphur application increased the microbial biomass carbon and arylsulphatase activity. Application of sulphur through gypsum or phosphogypsumin soil improved the soil microbial properties and sulphur availability. Application of sulphur @ 30 kg ha-1 through gypsum can increase the rice yield by 10 % over control (no sulphur).

 

 

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