search

APSIMInitiative / APSIM710

APSIM
https://www.apsim.info
33 stars 48 forks source link

Adding impact of root exudation on mobilisation of soil phosphorus in the soil P module #774

Closed ApsimBot closed 5 years ago

ApsimBot commented 5 years ago

Legacy Bug ID: 1275 Author: Guest Enli Wang Date: 2011-02-24 15:54:47 +0000 UTC

STEP 1: PROPOSAL

Short description of the concept or proposed improvements: 
The current soilP module does not account for the impact of plant root exudation on mobilisation of soil phosphorus. It is unable to simulate the higher P use efficiency of the new plant cultivars that have a higher efflux of exudation such as citrate acid. 

Rationale and Justification: 
Adding the impact of root exudation on P availability in the soil will enable APSIM to simulate the improved growth of plantcultivars that have higher citrate efflux from roots and the implications on soil P dynamics. This is one of the objectives in the CSIRO-BAYER project on PUE of new plant traits

Details of the proposed improvements: 
(1) link the potential P supply in each soil layer to the root length density and the P uptake power of roots, and

(2) relate the change in P concentration in the soil solution to the citrate efflux from roots and the efficiency of citrate to solubilise soil P  

Implications for users: 
The new functionablity would be made fully backwards compatible, so would not impact on exisiting users and simulations

Reviewer: 
Neil Huth

Review Panel Contact: 
Graeme Hammer

Supporting documentation (optional):
ApsimBot commented 5 years ago

Author: murphy Date: 2011-03-25 10:20:00 +0000 UTC

The RP at its meeting of 04/03/11 requested addditional information about this proposal. Email sent to Enli Wang (Cc to Graeme Hammer) on 25/03/11:

Dear Enli,

I refer to APSIM Task ID 1275 - Adding impact of root exudation on mobilisation of soil phosphorus in the soil P module http://www.apsim.info/BugTracker/sv-major_tasks.aspx?id=1275

The APSIM Initiative Reference Panel (RP) require additional details about this proposal before they can properly evaluate it and give approval to proceed.

(Step 2 in attached Process for Incorporating Improvements into APSIM).

Graeme Hammer is the RP contact for this Task and would be happy to discuss the issue with you in more detail.

Regards

Chris Murphy 
Principal Project Officer (APSIM)
ApsimBot commented 5 years ago

Author: murphy Date: 2013-01-31 11:21:00 +0000 UTC

Status Update from Enli Wang -

" I thought this has been already implemented in APSIM in the previous release. I will need to update the wheat parameter file for P modeling (no need for coding change). I will try to do this early next year."