Is it possible that fertilization of trees by spreading N-P-K on soil brings to a longer annual shoot growth but in an other hand they will have less leaves each?
Thanks Dr Nazir. We cannot do fertilization to any crop , either to improve only the shoot growth , but not the number of leaves or vice-versa or even both . Nutrients will get accumulated in those plant parts , which are comparatively stronger sink for that nutrient, or nutrients by and large...
This operation caused longer shoot growth yes ,but not less leaves unless you mean leaves number per length unit ,because fertilization caused alond distance between an inter node and the following one,at the same time good fertilization caused an increase in intact leaf area.
Fertilisation is expected to accelerate canopy closure after which the effects tend to taper off
Endorsing the response from Paul, we need to understand, in trees, there is first root flush followed by new flush of leaves to later trigger off floral primordial acceleration..then off course the whole course of reproductive biology. Spreading N-P-K across crop phonology needs to be worked out in a given agro-pedological condition..We can not have have any generalised statement in this matter...
many thanks for your interest in my question. Please Prof Sultan Ahmed Ismail - can you be more explicit? have you a published work on this finding? thanks
If nutrients deficits are properly diagnosed and accordingly applied , these growth responses to different plant parts depend upon, how weak or strong , these plant 0parts act as nutrient sink..
Unless , you compare different modes of fertilization , how could you precisely say that ...
In the absence of such information , how does a plant or different plant parts recognise the internal nutrient source versus externally applied nutrient source...
Unless you address all deficient nutrients through fertilization, there will be different effect on plants by fertilizer addition. Moreover, there are other factors too upon which fertilization effects depends like soil properties, climatic conditions and plant differences. Dr. Kumar's answer explains these possibilities.
Thanks Dr Nazir. We cannot do fertilization to any crop , either to improve only the shoot growth , but not the number of leaves or vice-versa or even both . Nutrients will get accumulated in those plant parts , which are comparatively stronger sink for that nutrient, or nutrients by and large...
Hello, Here is an article that you can read in my profile related to your question.
- Study of the Impact of Water and Nitrogen Resources on Aphid Infestations and Growth and Production Parameters in the Orchard of Peach. Two other papers in my profile can clear you up.
Such differential response could also be viewed on account of variable strength of shoot and leaves as sink ..
The response of the plant may depend on many factors ,like plant species, growth habit , plant life cycle(Annual ,Biennial , or perennial), plant age , the time of application for perennial plants .For instance in fruit crops the starter application may caused long growth with less leaves number per length unit due to the strong growth nature of spring flush.
Which one is a stronger sink , shoots or leaves, regardless of these variables..?
Whether serve a nutrient source to either leaves or fruits..regardless of crops..?
Shoots and fruit are stronger sinks for nutrients. Eaves are just functional but not strong sinkers.
But leaves act as both initially sink and later on source to developing fruits , quite unlike shoots and fruits hardly act as nutrient source...
Nice feedback Dr Nazir..
This is a season specific as well as location specific case.In highly fertile soils, addition of any fertilizer will have least effect on giving any priority to shoot and leaves.However in case of starved and light fertility soils,any addition will reflect much earliar as compared to previous situations.Rest assured that either of soil applied fertilizer has to go through xylem transport and later it shall trigger the vegetative growth.Peculiar thing about trees is that depending upon their class i.e annual/deciduous or evergreen,foliage/branches etc shall be added only during specific growth period for such stage and it normally occurs before flowering except few cases whee flowering precedes vegetative growth.
Thanks Dr Nazir. Regardless of basic principles of soil test-crop response , certain physiological responses of crop when defined through nutritional physiology , they dont undergo much changes...A plant always effectively distinguishes the internal nutrient reserve against exogeneously applied nutrients..., and plant always prefers internal nutrient reserve first over externally applied nutrient source...But this is not case specific , unless planst are exposed to some kind of stress...
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