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Titolo:
EFFECT OF RESIDUE PLACEMENT AND CHEMICAL FERTILIZER ON SOIL MICROBIALBIOMASS UNDER TROPICAL DRYLAND CULTIVATION
Autore:
SINGH H; SINGH KP;
Indirizzi:
BANARAS HINDU UNIV,DEPT BOT VARANASI 221005 UTTAR PRADESH INDIA
Titolo Testata:
Biology and fertility of soils
fascicolo: 4, volume: 16, anno: 1993,
pagine: 275 - 281
SICI:
0178-2762(1993)16:4<275:EORPAC>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIRECT EXTRACTION METHOD; NEW-ZEALAND SOILS; ORGANIC-MATTER; BIOCHEMICAL CHARACTERISTICS; MINERALIZABLE NITROGEN; ESTABLISHED PASTURE; AGRICULTURAL SOILS; PHOSPHORUS; TILLAGE; CARBON;
Keywords:
NUTRIENT DYNAMICS; DRYLAND AGRICULTURE; REDUCED TILLAGE; MICROBIAL BIOMASS; STRAW APPLICATION; FERTILIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
45
Recensione:
Indirizzi per estratti:
Citazione:
H. Singh e K.P. Singh, "EFFECT OF RESIDUE PLACEMENT AND CHEMICAL FERTILIZER ON SOIL MICROBIALBIOMASS UNDER TROPICAL DRYLAND CULTIVATION", Biology and fertility of soils, 16(4), 1993, pp. 275-281

Abstract

Four treatments (control, chemical fertilizer, wheat straw, and wheatstraw + fertilizer) were established on the dryland experimental farmof the Institute of Agricultural Sciences, Banaras Hindu University. Organic C in the different treatments ranged from 0.69 to 0.93%, totalN from 0.08 to 0.11%, and total P from 0.018 to 0.021. The application of straw significantly increased the soil water-holding capacity. The maximum effect on the microbial biomass was realized with the straw fertilizer treatment, followed by straw and then by the fertilizer treatment. During the study microbial biomass C ranged from 144 to 491 mug g-1 dry soil, biomass N from 14.6 to 50.1 mug g-1, and biomass P from 7.2 to 17.6 mug g-1 soil. Microbial biomass C, N and P represented3.2-4.6% of total C, 2.6-3.8% of total N, and 5.8-8.2% of total P in the soil, respectively, in all cases the highest proportion occurred in the straw+fertilizer treatment and the lowest in the control. Microbial biomass C, N, and P were positively correlated with each other. Microbial biomass C and N increased by 77% in straw+fertilizer-treated plots relative to the control. The increase in microbial biomass P in the straw+fertilizer treatment over the control was 81%. The increase in the microbial biomass is expected to enhance nutrient availability in the soil, as the microbial biomass acts both as a sink and a source of plant nutrients.

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Documento generato il 24/11/20 alle ore 11:13:38