Growth stage of rice plant(水稻生长阶段 全英文版)_水稻生长几个时期

Growth stage of rice plant(水稻生长阶段 全英文版)由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“水稻生长几个时期”。

Table Of Contents TABLE OF CONTENTS.................................................................................................1 OVERVIEW AND OBJECTIVES...................................................................................2 THREE GROWTH PHASES..........................................................................................2 GROWTH STAGES 0-9..................................................................................................3 VEGETATIVE PHASE....................................................................................................8

Stage 0Seedling............................................................................................................9 Stage 2Stem elongation..............................................................................................14

REPRODUCTIVE PHASE............................................................................................17

Stage 4Heading...........................................................................................................20 Flowering........................................................................................................................21

RIPENING PHASE........................................................................................................24

Stage 7Dough grain stage..........................................................................................26 Stage 9Germination to emergence

Seeds are usually pregerminated by soaking for 24 hours and incubating for another 24 hours.After pregermination the radicle and plumule protrude through the hull.By the second or third day after seeding in the seedbed, the first leaf breaks through the coleoptile.The end of stage 0 shows the emerged primary leaf still curled and an elongated radicle.Stage 1Tillering

This stage extends from the appearance of the first tiller until the maximum tiller number is reached.Tillers emerge from the axiliary buds of the nodes and displace the leaf as they grow and develop.This seedling shows the position of the two primary tillers with respect to the main culm and its leaves.After emerging, the primary tillers give rise to secondary tillers.This occurs about 30 days after transplanting.The plant is now increasing in length and tillering very actively.Here is a field with plants at the early tillering stage.Note the tiller size and canopy development due to increased leafing and tiller development.Besides numerous primary and secondary tillers, new tertiary tillers arise from the secondary tillers as the plant grows longer and larger.By this stage, the tillers have multiplied to the point that it is difficult to pick out the main stem.Tillers continuously develop as the plant enters the next stage which is stem elongation.Stage 3Panicle initiation to booting

The initiation of the panicle primordium at the tip of the growing shoot marks the start of the reproductive phase.The panicle primordium becomes visible to the naked eye about 10 days after initiation.At this stage, 3 leaves will still emerge before the panicle finally emerges.In short-duration varieties, the panicle becomes visible as a white feathery cone 1.0-1.5 mm long.It occurs first in the main culm and then in tillers where it emerges in uneven pattern.It can be seen by diecting the stem.As the panicle continues to develop, the spikelets become distinguishable.The young panicle increases in size and its upward extension inside the flag leaf sheath causes the leaf sheath t bulge.This bulging of the flag leaf sheath is called booting.Booting is most likely to occur first in the main culm.At booting, senescence(aging and dying)of leaves and nonbearing tillers are noticeable at the base of the plant.Stage 5Milk grain stage

The last 3 stages of growth, stages 7, 8, and 9 comprise the ripening phase.Stage 7.Milk grain stage

In this stage, the grain has begun to fill with a milky material.24

The grain starts to fill with a white, milky liquid, which can be squeezed out by preing the grain between the fingers.The panicle looks green and starts to bend.Senescence at the base of the tillers is progreing.The flag leaves and the two lower leaves are green.Stage 8Mature grain stage

The individual grain is mature, fully developed, hard, and has turned yellow.27

This slide shows rice plants at the mature grain stage.Ninety to one hundred percent of the filled grains have turned yellow and hard.The upper leaves are now drying rapidly although the leaves of some varieties remain green.A considerable amount of dead leaves accumulate at the base of the plant.Print version The manual for Growth Stages of the Rice Plant may also be completely printed, provided you have a printer attached to your computer and Microsoft Word.Click here to launch the entire contents of this reference guide in Microsoft Word.Period/Growth phases

 Index 0

0-9.....................................................................................................................................2, 3 according..........................................................................................................................2 1

18-day-old.............................................................................................................................8 18-day-old seedling..............................................................................................................9 1st.......................................................................................................................................21 2

soaking..............................................................................................................................8 2nd......................................................................................................................................21 3

3rd......................................................................................................................................21 4

45-day...................................................................................................................................2 6

65-day...................................................................................................................................2 A

According.............................................................................................................................2 0-9......................................................................................................................................2 After pregermination.............................................................................................................8 Anthesis..............................................................................................................................21 Axiliary................................................................................................................................11 Axiliary buds.......................................................................................................................11 C

Characteristics......................................................................................................................2 IR64...................................................................................................................................2 Coleoptile..............................................................................................................................8 Culm.............................................................................................................................11, 17 D

Distinguishable...................................................................................................................17 Dough grain stage..........................................................................................................3, 26 E

Early-maturing....................................................................................................................14 semidwarfs......................................................................................................................14 Emergence............................................................................................................................8 Germination.......................................................................................................................8 Exsertion........................................................................................................................3, 20 30 G

Germination..........................................................................................................................8 emergence.........................................................................................................................8 Glumes...............................................................................................................................21 Growth............................................................................................................................3, 29 Growth phases......................................................................................................................2 Growth stages 1-10...............................................................................................................3 H

Heading..............................................................................................................................20 I

IR64.................................................................................................................................2, 14 characteristics...................................................................................................................2 IR8........................................................................................................................................2 M

Mature grain stage..........................................................................................................3, 27 Microsoft Word...................................................................................................................29 Milk grain stage..............................................................................................................3, 24 O

Objectives.............................................................................................................................2 Overview...............................................................................................................................2 P

Panicle initiation....................................................................................................2, 3, 14, 17 Period/Growth phases........................................................................................................29 Plumule.................................................................................................................................8 Pregerminated......................................................................................................................8 Primordium.........................................................................................................................17 Print version.......................................................................................................................29 R

Rice Plant............................................................................................................................29 S

Seedling................................................................................................................................8 Semidwarf.............................................................................................................................2 Semidwarfs.........................................................................................................................14 early-maturing.................................................................................................................14 Soaking.................................................................................................................................8 24.......................................................................................................................................8 Spikelet...............................................................................................................................21 Spikelets.......................................................................................................................17, 21 Stage...........................................................................2, 3, 8, 11, 14, 17, 20, 21, 24, 26, 27, 29 Stem elongation........................................................................................................3, 11, 14 T

T 17 Tillering...............................................................................................................................11