Agriculture Reference
In-Depth Information
Shoot
growth
Nutrient
Use
efficiency
Plant
Nutrient
Demand
Root
Compensatory adjustment
•
Symbiotic association
e.g. mycorrhiza and N
2
fix
•
Uptake kinetics
Soil
tempera
ture
•
Turnover & Lifespan
•
Growth & morphology
Photosy
nthesis
&
Transpir
ation
Nutrient availability at the root
surface
•
Decomposition &
mineralization
Plant
Nutrient uptake
•
Mass flow
•
Difffusion
•
Mineral weathering
Water flux
Fig. 32
Concept on nutrient uptake.
development process. In the process cytokinin content declined
while ABA content increased during cold acclimatization, in
spite of a huge cellular division and enlargement which is
associated in the reproductive period of rice growth.
From the above mentioned fi ndings it is evident that low
temperature at early and late reproductive phase of plant
growth of rice, ultimately, spikelet fertility is affected severely.
Rice varieties respond differently the spikelet sterility at any
