Please use this identifier to cite or link to this item:
http://digitalrepository.fccollege.edu.pk/handle/123456789/1317
Title: | Carbon availability and microbial biomass in soil under an irrigated wheat-maize cropping system receiving different fertilizer treatments |
Authors: | Mahmood, T. Azam, F. Hussain, F. Malik, Dr. Kauser .A. |
Keywords: | Carbon biomass changes fertilizer |
Issue Date: | May-1997 |
Publisher: | springer link |
Citation: | Mahmood, T., Azam, F., Hussain, F. et al. Carbon availability and microbial biomass in soil under an irrigated wheat-maize cropping system receiving different fertilizer treatments. Biol Fertil Soils 25, 63–68 (1997). https://doi.org/10.1007/s003740050281 |
Series/Report no.: | Biol Fertil Soils 25, 63–68 (1997).; |
Abstract: | Seasonal changes in carbon availability and microbial biomass were studied in soil under an irrigated wheat-maize cropping system receiving different fertilizter treatments over the past 10 years. Treatments included N-100 and N-200 (urea at 100 and 200kgNha–1 year–1, respectively), FYM-16 and FYM-32 (farmyard manure at 16 and 32tha–1 year–1, respectively) and a control (unfertilized). Aerobically mineralizable carbon (AMC; C mineralized after 10 days aerobic incubation at 30°C) increased (13–16%) under wheat at both rates of urea whereas under maize it increased (22%) only with the lower rate of urea. Farmyard manure also increased the content of soil AMC under both crops, the effect being two- to threefold higher under wheat than under maize. Urea application caused an 32–78% increase in the specific respiratory activity (SRA) under wheat but caused an 11–50% decrease during the maize season. Farmyard manure also resulted in a higher SRA under both crops but only at the higher application rate. Under wheat, microbial biomass C (MBC) decreased in urea-treated plots but showed a slight increase at the higher rate of FYM. During the maize season, MBC was higher under both urea (42–46%) and FYM (36–47%) treatments as compared to the control. Microbial biomass turnover rate was highest for FYM-32 (2.08), followed by FYM-16 and urea treatments (1.35–1.49); control plots showed a turnover rate of 0.82. The higher AMC and SRA during the active growth period of wheat than that of maize indicated that root-derived C from wheat was higher in amount and more easily degradable. |
Description: | https://link.springer.com/article/10.1007/s003740050281#citeas |
URI: | http://localhost:8080/xmlui/handle/123456789/1317 |
Appears in Collections: | School of Life Sciences |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Carbon availability and microbial biomass in soil under an irrigated wheat-maize cropping system receiving different fertilizer treatments.pdf | 3.07 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.