Participatory maize variety evaluation for WUE

Overview

The goal of this project is to enhance maize productivity through improved water management technologies. To do this we are developing efficient water management techniques in irrigated Maize – based farming systems. The specific project objectives are to use participatory evaluation to assess 14 released maize varieties for water use efficiency for smallholder farmers’ use in irrigated agriculture in Malawi. Two irrigation regimes, full and alternative furrow irrigation, will be tested on all 14 maize varieties. Data will be collected starting three weeks after planting and continuing every 3 weeks until physiological maturity.

Protocols

The One Protocol (Phi2, PSI, NPQ) II

The One Protocol to rule them all! Phi2, PSI, NPQt, combined!

Changes from previous The One protocol: - no longer outputs signal from the far red period, which simplifies the signal output for the user - changed distance between measuring pulses from 10,000 to 2,000 which improves measurement resolution - has an initial stabilization period, so Fs has a chance to adjust to the actinic. - the measuring lights are used only when actually needed (before lights 15 and 10 were always pulsed, even when the values were not used in the macro outputs) - removed light 2 (650) on add-on board during the actinic periods so now actinic is just light 20 (650) on the main boards. This was causing the actinic to not match ambient, as the combination of two 650 lights was greater than the ambient value.

Chlorophyll content (SPAD) I

REQUIREMENTS: Firmware v0.38 or lower (used for older devices which do not have a SPAD calibration, generally device ID 87 and lower).Measures transmission at 940nm and 650nm in order to determine the 'greenness' of a leaf, an indicator of chlorophyll content and nitrogen content. The 940 is used to account for leaf thickness.

Questions

  1. Site (Multiple Choice)
  2. Replicate (Multiple Choice)
  3. Water Regime (Multiple Choice)
  4. Plot (Multiple Choice)
  5. Leaf Position (Multiple Choice)
  6. Weeks after planting (Short Answer)

Locations

Discussions

Team

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