Growth Stages of Rice Plant

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Growth Stages of Rice Plant
Life cycle of rice plant may be categorized into five levels.

1.Seedling (sowing to transplanting)

2.Active vegetative stage (Transplanting to a maximum tillering degree)
three.

3.Vegetative lag segment (Maximum filtering to panicle initiation)

4.Reproduction degree (PI to flowering) five.Ripening level (Flowering to harvest).

1. Seedling stage (Nursery level):

Germination to transplanting. Seed germinating to time whilst young flora turn out to be unbiased of meals reserve of the seed i.E. Nursery level.

2. Active Vegetative Stage (Transplanting to Max. Tillering stage):

This consists of sub-ranges viz.,
a) Recovery degree

b) Rooting degree

c) Maximum tillering degree

The transplanted seedlings want/require approximately nine days to recover from the shock of uprooting at some stage in transplanting and then new roots appear.

It is likewise called the recovering and rooting level. Once the plants has properly-established roots, tillers develop rapidly and increase to a most amount. Tiller top and strawweight also will increase at some point of this diploma.

The tiller variety will increase until maximum tiller variety is reached, and then some tillers die and tiller wide variety declines and then stages off.

3. Vegetative lag level (Maximum tillering to panicle initiation):

It includes sub-tiers

(i) Effective tillering diploma

(ii) Non-powerful tillering stage;

During this level, susceptible tillers begin to die; every sturdy tiller bears a panicle primordium. The huge form of these capability effective (ear bearing) tillers come to be consistent at this degree that is referred to as “Effective tillering stage”.

Tillers that growth finally do no longer endure panicles and die ultimately.

This is the “non-effective tillering stage”. The visible elongation of decrease internodes may additionally start outstanding in advance than the reproductive segment or at the approximately identical time.

4. Reproductive degree (PI to Flowering) :

Panicle improvement continues and young panicle primordium becomes seen to the bare eye in a few days as an apparent shape 1 to 2 mm lengthy with a fuzzed or spongy like shape.

The developing spikelets then grow to be distinguishable. Bulging to booting and panicle emergence from flag leaf and sheath is known as “heading”.

Anthesis or flowering/blooming starts offevolved with the protrusion of the primary dehiscing anthers in the terminal spikelets at the panicle branches.

With the initiation of panicle primordium, the internode elongates. The sheath of the flag leaf bulges because of the growing panicles inside its.

This is the “booting stage”. The discount department of pollen mother cells and embryo sac mother cells takes vicinity currently. The more youthful panicle emerges from the “boot”. Anthesis takes area (self), fertilization follows.

This is called “Heading & Flowering”.A huge quantity of water eats up within the primary part of the reproductive growth duration.

Drought for the duration of particle primordial initiation to flowering stage impairs panicle formation, heading, flowering, and fertilization and results in accelerated sterility and in the long run lower yield. Pollination and fertilization follow after flowering.

The improvement of the fertilized egg and endosperm turns into seen some days following fertilization.

5. Ripening State (Flowering to reap):

This includes the substages of grain viz., milk, smooth dough, hard dough & fully ripe tiers (milky ripe, tender ripe, waxy ripe and absolutely ripe degrees). Panicle weight increases swiftly. Staw weight decreases.

During the vegetative boom length, a rather small quantity of water is needed. Therefore shortage at this period does no longer substantially have an effect on the yield, except at the recuperating and rooting degrees.

Stages after panicle primordial development, particularly booting, heading and flowering levels need sufficient water.

 

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