ਜਿੰਨਾ ਨਿੱਕਾ ਉਨਾਂ ਜਰੂਰੀ ਤੱਤ ਬੋਰੌਨ | boron deficiency in paddy

Описание: ਜਿੰਨਾ ਨਿੱਕਾ ਉਨਾਂ ਜਰੂਰੀ ਤੱਤ ਬੋਰੌਨ | boron deficiency in paddy #paddy
Boron deficiency is relatively rare especially in irrigated rice systems It is not very common in rice but can occur in the following soils

highly weathered acid red soils and sandy rice soils in China
acid soils derived from igneous rocks
soils formed from marine sediments
high organic matter status soils
How to identify
Check the leaves for symptoms Symptoms usually appear first on young leaves Tips of emerging leaves are white and rolled (similar to Calcium deficiency)
In severe conditions growing points can die but new tillers continue to emerge
Plants also have reduced height
When infected at panicle initiation stage B deficiency can cause plants to not produce panicles
To confirm B deficiency bring soil and plant sample to a laboratory for testing.
Why is it important
Although rare in irrigated rice systems B deficiency affects the rice crop throughout its growth cycle

How to manage
The following general measures are recommended to prevent B deficiency

Manage water efficiently Avoid excessive leaching or draining of water B is very mobile in flooded rice soils
Where possible, apply slow-acting B sources (e g colemanite) at intervals of 2−3 years. B fertilizers have a longer residual effect in silty and clayey soils (apply 2−3 kg B ha-1) than in sandy soils (apply 3−5 kg B ha-1)

In rice-wheat systems B applied to wheat can alleviate B deficiency in the subsequent rice crop. Do not apply excessive amounts of B to avoid B toxicity
There is currently no practical treatment option for B deficiency Where possible

Apply B in soluble forms (borax) for rapid treatment (0.5−3 kg B ha-1) Broadcast and incorporate it before planting It can also be topdressed or used as foliar spray during vegetative rice growth Do not mix borax and fertilizer borates with ammonium fertilizers
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