נגישות
menu      
חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
The effect of cultivation practices on soil - atmosphere carbon cycle under - Abstract
Year:
2010
Source of publication :
Geophysical Research Abstracts
Authors :
בונפיל, דוד
;
.
Volume :
Co-Authors:

Dbvid Lifschitz  -Porter School of Environmentbl Studies, Tel-Aviv University, Tel-Aviv, Israel

 Mbrcelo Sternberg - Depbrtment of Plbnt Sciences, Tel-Aviv University, Tel-Aviv, Israel

Eybl Ben-Dor - Geogrbphy bnd the Environment Depbrtment, Tel-Aviv University, Tel-Aviv,Israel

 Gil Eshel  -The Soil Erosion Resebrch Station, Israel

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

The soil – atmosphere carbon cycle was studied under arid climate conditions, in relation to crop management. Management included different tillage (Conventional vs. No Tillage, CT vs. NT respectively) and fertilization (nitrogen and phosphorus application vs. unfertilized) practices, in a continuous (winter) wheat field, for two growing seasons (2007-08 and 2008-09). The NT practice was characterized by higher CO2 effluxes than the CT during the growing season. In turn, the CT practice had higher pCO2 throughout the soil profile to a depth of 2m. This could be explained partially by a physical crust formation due to raindrop impact, emerging on the bare soil, mostly in the CT practice. The crust serves as a barrier for gas exchange (soil aeration) and in addition, also reduces rainfall infiltration, and all together harms the growing potential (the NT practice yielded higher plant biomass). Fertilization application had no apparent effect on the CO2 effluxes or the pCO2, but had a significant effect on the yield of the plant biomass. The NT practice had also higher amounts of soil organic Carbon, (SOC) mainly in the surface layer, and soil inorganic Carbon (SIC) to a depth of 2m. This is attributed to straw mulch application for the former and better gas and water conductivity (that initiates carbonate dissolution – precipitation cycles) for the latter, which is a much more dominant factor in arid area soils. The stable carbon isotope analysis (δ 13C) values for the total Carbon (TC), SOC and SIC results show that the NT practice generates higher amounts of pedogenic carbonates also, and in general is clearly superior over CT in almost every aspect in the soil – atmosphere C cycle

Note:
Related Files :
atmosphere
Carbon
carbon cycle
Cultivation
soil
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
גוגל סקולר
Publication Type:
תקציר
;
.
Language:
אנגלית
Editors' remarks:
ID:
39129
Last updated date:
02/03/2022 17:27
Creation date:
28/01/2019 14:24
Scientific Publication
The effect of cultivation practices on soil - atmosphere carbon cycle under - Abstract

Dbvid Lifschitz  -Porter School of Environmentbl Studies, Tel-Aviv University, Tel-Aviv, Israel

 Mbrcelo Sternberg - Depbrtment of Plbnt Sciences, Tel-Aviv University, Tel-Aviv, Israel

Eybl Ben-Dor - Geogrbphy bnd the Environment Depbrtment, Tel-Aviv University, Tel-Aviv,Israel

 Gil Eshel  -The Soil Erosion Resebrch Station, Israel

The effect of cultivation practices on soil - atmosphere carbon cycle under arid climate conditions

The soil – atmosphere carbon cycle was studied under arid climate conditions, in relation to crop management. Management included different tillage (Conventional vs. No Tillage, CT vs. NT respectively) and fertilization (nitrogen and phosphorus application vs. unfertilized) practices, in a continuous (winter) wheat field, for two growing seasons (2007-08 and 2008-09). The NT practice was characterized by higher CO2 effluxes than the CT during the growing season. In turn, the CT practice had higher pCO2 throughout the soil profile to a depth of 2m. This could be explained partially by a physical crust formation due to raindrop impact, emerging on the bare soil, mostly in the CT practice. The crust serves as a barrier for gas exchange (soil aeration) and in addition, also reduces rainfall infiltration, and all together harms the growing potential (the NT practice yielded higher plant biomass). Fertilization application had no apparent effect on the CO2 effluxes or the pCO2, but had a significant effect on the yield of the plant biomass. The NT practice had also higher amounts of soil organic Carbon, (SOC) mainly in the surface layer, and soil inorganic Carbon (SIC) to a depth of 2m. This is attributed to straw mulch application for the former and better gas and water conductivity (that initiates carbonate dissolution – precipitation cycles) for the latter, which is a much more dominant factor in arid area soils. The stable carbon isotope analysis (δ 13C) values for the total Carbon (TC), SOC and SIC results show that the NT practice generates higher amounts of pedogenic carbonates also, and in general is clearly superior over CT in almost every aspect in the soil – atmosphere C cycle

Scientific Publication
You may also be interested in