Abstract
This experiment was carried out to elucidate the effect of residue C/nutrient ratio on P pools and N availability in wheat rhizosphere. The microcosms included an upper and a lower PVC core with one end of both cores covered by nylon mesh. Wheat was planted in the upper core. To the lower core, crop residues were added as a thin uniform layer on the top mesh. Treatments were control without residue or wheat growth, wheat growth without crop residue, barley straw without or with wheat growth, and barley faba bean residue without or with wheat growth. Sampling was carried out after 14 and 28 days in wheat rhizosphere alone, detritusphere of faba bean residue and barley straw, and in the rhizosphere/detritusphere interface. Mass loss of low C/P faba bean residue was greater than of high C/P barley straw; and mass loss was greater in the detritusphere alone than in the rhizosphere/detritusphere interface. Plant P concentration and P uptake were higher with faba bean residue than with straw and unamended wheat plants. With faba bean, most P pools and N availability, but not microbial biomass N and P, were lower in the rhizosphere/detritusphere interface than detritusphere alone. P pools were higher in detritusphere of faba bean residue than wheat rhizosphere alone. With straw, P pools and MBN were low and not affected by wheat roots. P pools and N availability in the wheat rhizosphere/detritusphere interface were influenced by residue type, and plant nutrient uptake reduced P pools and available N only with low carbon/nutrient faba bean residue.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.