Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

United States Department of Agriculture (USDA) National Institute of Food and Agriculture

Titre : NUTRIENT CYCLING AND PRECIPITATION USE EFFICIENCY FOR INCREASING PRODUCTIVITY AND RESILIENCE IN DRYLAND AGROECOSYSTEMS

Identification : 0441159

Pays : Etats Unis

Durée : START : 01 OCT 2021 TERM : 30 SEP 2026

Objectifs
Objective 1 : Quantify impact of intercropped legume cover crops with winter wheat to increase soil carbon and reduce herbicide and synthetic nitrogen (N) fertilizer inputs. Sub-objective 1.A : Identify the best performing legume cover crops for intercropping with winter wheat that reduces herbicide and synthetic N while improving precipitation use efficiency in intermediate rainfall zones. Subobjective 1.B : Examine whether legume cover crop intercropped with winter wheat can increase soil organic carbon (SOC), reduce herbicide and synthetic N fertilizer inputs, and reduce CO2 and CH4 emissions. Objective 2 : Measure deep root-zone water dynamics in dryland cropping systems to optimize water storage with tillage, crop residue, cover crop, and weed management. Objective 3 : Examine the use of biostimulants and biochar (such as thermal carbonized manure) as amendments in dryland wheat production systems in order to improve soil and plant health, profitability, and resilience to extreme weather and climate change. Sub-objective 3.A : Establish whether the addition of biostimulants to soils can enhance plant growth and soil properties to reduce drought stress under semi-arid dryland wheat production conditions. Sub-objective 3.B : Determine whether the addition of thermal carbonized manure to soils can increase soil pH in the N fertilizer application zone and enhance plant nutrient uptake under semiarid dryland wheat production systems.

Performing Institution : AGRICULTURAL RESEARCH SERVICE PENDLETON, OREGON 97801
Investigator : GOLLANY H T ; WUEST S B ; DURFEE N M

Présentation : USDA (NIFA)