Phosphorus - A Key Factor in the Development of Novel Perennial Herbaceous Deep-rooted Pasture Legumes. This research aims at the development of urgently needed perennial pasture legumes, to expand perennial pasture options for southern Australia beyond lucerne. The development of new deep-rooted perennial pasture legumes has enormous potential to improve nutrient and water use over large areas of agricultural land. Benefits in terms of reducing soil erosion and acidification are also likely. An ....Phosphorus - A Key Factor in the Development of Novel Perennial Herbaceous Deep-rooted Pasture Legumes. This research aims at the development of urgently needed perennial pasture legumes, to expand perennial pasture options for southern Australia beyond lucerne. The development of new deep-rooted perennial pasture legumes has enormous potential to improve nutrient and water use over large areas of agricultural land. Benefits in terms of reducing soil erosion and acidification are also likely. An understanding of the responses of new perennial legumes to soil phosphorus is a prerequisite for the development of new perennial farming systems. Overall, both environmental and financial benefits will accrue at scales ranging from individual farmers and rural industries through to the general community.Read moreRead less
Unravelling the secrets of the rhizosphere of crops. Phosphate is one of the most important limiting nutrients for crop growth and production. Plant acquisition of soil phosphate largely depends on root proliferation to accelerate soil exploration, and on phosphate bioavailability mediated by root exudates and rhizosphere microorganisms. Central to this is the need for a better understanding of the complex biogeochemical interfaces in the rhizosphere. This project explores recently developed non ....Unravelling the secrets of the rhizosphere of crops. Phosphate is one of the most important limiting nutrients for crop growth and production. Plant acquisition of soil phosphate largely depends on root proliferation to accelerate soil exploration, and on phosphate bioavailability mediated by root exudates and rhizosphere microorganisms. Central to this is the need for a better understanding of the complex biogeochemical interfaces in the rhizosphere. This project explores recently developed non-destructive imaging, isotope, and metabolism techniques to generate a systematic research tool in tracking rhizosphere interactions and imaging phosphate dynamics from macroscale to nanoscale levels. This study will provide new opportunities to improve crop nutrient use efficiency and crop production.Read moreRead less
Role of stubble management in improving soil fertility. In highly-weathered nutrient-poor soils of the south-western Australia, the amount of nutrients in stubble is critical in nutrient cycling as well as in determining optimal amounts of fertilisers to be applied. Stubble management is therefore an integral part of crop fertilisation and nutrient management. We will characterise nutrient cycling in the stubble-soil-crop continuum in a range of cropping situations. Computer modelling will be us ....Role of stubble management in improving soil fertility. In highly-weathered nutrient-poor soils of the south-western Australia, the amount of nutrients in stubble is critical in nutrient cycling as well as in determining optimal amounts of fertilisers to be applied. Stubble management is therefore an integral part of crop fertilisation and nutrient management. We will characterise nutrient cycling in the stubble-soil-crop continuum in a range of cropping situations. Computer modelling will be used to extend applicability of results over space and time. This project will provide the knowledge required for improving fertiliser recommendations to take into account changes in the cropping systems that have occurred in the last 10-20 years.Read moreRead less
Turning sand into sheep feed - Lebeckia ambigua an agricultural perennial! This project aims to develop nitrogen-fixing legumes adapted to the changing climate. Nitrogen fixation from legumes is worth $3 billion to the Australian agricultural economy, but changing rainfall patterns threaten much of this. One solution is to transition pasture growth to a reliance on perennial plants, which are less affected by unseasonal rain. Lebeckia ambigua is an outstanding perennial legume to begin this chan ....Turning sand into sheep feed - Lebeckia ambigua an agricultural perennial! This project aims to develop nitrogen-fixing legumes adapted to the changing climate. Nitrogen fixation from legumes is worth $3 billion to the Australian agricultural economy, but changing rainfall patterns threaten much of this. One solution is to transition pasture growth to a reliance on perennial plants, which are less affected by unseasonal rain. Lebeckia ambigua is an outstanding perennial legume to begin this change, but its nitrogen fixation is compromised by nodulation failure caused by death of its symbiotic rhizobia. This project intends to improve the survival in acid and infertile soils of the unique rhizobial symbionts the research team has discovered for Lebeckia ambigua in South Africa.Read moreRead less
Ecology of fine root endophytes in native and agricultural ecosystems. This project aims to investigate the abundance, diversity and function of fine root endophytes in Australian native and agricultural ecosystems in response to recent genetic data proving they are taxonomically distinct from the well-studied arbuscular mycorrhizal fungi. The project aims to complete a comprehensive field survey, novel molecular analyses and innovative glasshouse experiments. Outcomes should include globally si ....Ecology of fine root endophytes in native and agricultural ecosystems. This project aims to investigate the abundance, diversity and function of fine root endophytes in Australian native and agricultural ecosystems in response to recent genetic data proving they are taxonomically distinct from the well-studied arbuscular mycorrhizal fungi. The project aims to complete a comprehensive field survey, novel molecular analyses and innovative glasshouse experiments. Outcomes should include globally significant insights into fine root endophytes and their role in plant growth. The project will strengthen capacity to predict impacts of global environmental change on ecosystem functions driven by the soil rhizosphere.Read moreRead less
Ecosystem response to climate and anthropogenic disturbances: implications for greenhouse gas emissions and nutrient cycling. Humanity is challenged with climate change, greenhouse gas emissions, declining fertiliser reserves and a need to feed the world's growing population. This project will result in greater understanding of how ecosystems can respond to these challenges and provide a framework to help Australia manage its agricultural and natural reserves.