vostok
Well-Known Member
CHAPTER 7 – CONCLUSION Irrigation management has many impacts on the final product of cannabis.
By implementing irrigation control strategies using cWP and/or cVPD thresholds, there can be a reduction in water and fertilizer use to achieve the same yield and THC concentration in cannabis. Irrigation practices can also be finely tuned to the specific cultivar through further study to provide the exact amount of water required to achieve the desired final product.
This reduction can also save a producer money through reduced water and fertilizer use. The relationship between cWP and cVPD can be used to create irrigation thresholds to be used in production facilities for other crops. For cannabis, the first half of the flower cycle was rapid vegetative growth causing the reduced accuracy of the cWP and cVPD relationship. The second half of the flower cycle has a very strong relationship between cWP and cVPD since the plants are only producing flower and no longer undergoing vegetative growth.
Measuring Ψ in a large-scale cannabis production facility with the use of stem psychrometers is not ideal, so the use of cVPD as a feedback variable for initiating irrigation can apply to the entire crop and be controlled using automated systems such as ARGUS. VPD is already measured in most production facilities, so the adaption of cVPD thresholds will be easy to implement.
To apply this method of irrigation scheduling to other cannabis cultivars or other plants, a relationship between cWP and cVPD will need to be established to ensure proper water relations are met within the crop but the general principles demonstrated here indicated that reduced water use, consistent irrigation frequency measured through cVPD and no flushing of the root zone are elements of a desirable irrigation management strategy for cannabis.
Full Here:Irrigation Management Strategies
By implementing irrigation control strategies using cWP and/or cVPD thresholds, there can be a reduction in water and fertilizer use to achieve the same yield and THC concentration in cannabis. Irrigation practices can also be finely tuned to the specific cultivar through further study to provide the exact amount of water required to achieve the desired final product.
This reduction can also save a producer money through reduced water and fertilizer use. The relationship between cWP and cVPD can be used to create irrigation thresholds to be used in production facilities for other crops. For cannabis, the first half of the flower cycle was rapid vegetative growth causing the reduced accuracy of the cWP and cVPD relationship. The second half of the flower cycle has a very strong relationship between cWP and cVPD since the plants are only producing flower and no longer undergoing vegetative growth.
Measuring Ψ in a large-scale cannabis production facility with the use of stem psychrometers is not ideal, so the use of cVPD as a feedback variable for initiating irrigation can apply to the entire crop and be controlled using automated systems such as ARGUS. VPD is already measured in most production facilities, so the adaption of cVPD thresholds will be easy to implement.
To apply this method of irrigation scheduling to other cannabis cultivars or other plants, a relationship between cWP and cVPD will need to be established to ensure proper water relations are met within the crop but the general principles demonstrated here indicated that reduced water use, consistent irrigation frequency measured through cVPD and no flushing of the root zone are elements of a desirable irrigation management strategy for cannabis.
Full Here:Irrigation Management Strategies
