of sulphur on soil biological properties, residual fertility
yield of aerobic rice grown under aerobic rice-wheat cropping system in
Ram1*, D. Kumar2, S. Babu3, D. Prasad4
and I. Dev1
Agroforestry Research Institute, Jhansi-284 003, India
Agronomy, Indian Agricultural Research Institute, New Delhi-110 012, India
Complex for NEH region, Sikkim Centre, Tadong-737 102, India
Research Station, Swami Keshwanand Rajasthan Agricultural University,
Sriganganagar-335 001, India
Author E-mail: email@example.com
received : 17.02.2016
received : 08.07.2016
received : 09.10.2016
Accepted : 05.11.2016
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.
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.
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.
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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