《种子生产学》课程教学课件（PPT讲稿）玉米授粉过程

EverydayShootbagsaresecuredonthetop1earoftheplanttocovertheshootbeforethesilkemergestopreventpollencontamination.2.Shootbagsmustbeplacedtightly around the ear so thebagwill stayonregardlessofthe elements

1 . Shootbags are secured on the top ear of the plant to cover the shoot before the silk emerges to prevent pollen contamination. 2.Shootbags must be placed tightly around the ear so the bag will stay on regardless of the elements. Everyday

The Day Before Pollination3.Toensurefreshsilkfor pollination,ears are cutthe day beforepollinationis to occur.4.Ashootbagispromptlyplaced overthefreshlycuteartoprotectit.5.Workersfoldthetopoftheshootbagawayfromtheeartoindicatewhichearswillbeusedforpollination thefollowingday.6.Checktheplant'stasselstoensurethattheplantwillshedenoughpollenforthenextday

The Day Before Pollination 3.To ensure fresh silk for pollination, ears are cut the day before pollination is to occur. 4.A shootbag is promptly placed over the freshly cut ear to protect it. 5.Workers fold the top of the shootbag away from the ear to indicate which ears will be used for pollination the following day. 6.Check the plant's tassels to ensure that the plant will shed enough pollen for the next day

Abagis carefullyplacedovertheplant'stasselsWorkersgraspthetasselbyholdingthebagandmakingacentralridgeforbettersupport.Thebag'sflapsarethensecured withanon-skidpaperclip

A bag is carefully placed over the plant's tassels. Workers grasp the tassel by holding the bag and making a central ridge for better support. The bag's flaps are then secured with a non-skid paper clip

The Day of Pollination10.Thebagistappedfivetoseventimestoreleasepollenfromthetassels.11.Workersneedtobecarefulsootherpollensourcesdo notget into the bag when theytakedownthebags.12.Holdtheopeningofthebagsoitiskeptshut.Foldtheopeningof thebagtowardsthefrontsideofthebagwithcrossesrecords

The Day of Pollination 10.The bag is tapped five to seven times to release pollen from the tassels. 11.Workers need to be careful so other pollen sources do not get into the bag when they take down the bags. 12.Hold the opening of the bag so it is kept shut. Fold the opening of the bag towards the front side of the bag with crosses records

Putthefoldedhalfofthebagovertheshoottobe13.pollinated.Pullouttheshootbagwhilecoveringtheshootwith14.thepollinationbagsothesilkisneverexposed.Straightenthebagandtapslightlysothepollenis15.introducetothefreshsilkStapleallfourflapsofthebagtightlyagainstthe16.stalkwithonestaple

13. Put the folded half of the bag over the shoot to be pollinated. 14. Pull out the shootbag while covering the shoot with the pollination bag so the silk is never exposed. 15. Straighten the bag and tap slightly so the pollen is introduce to the fresh silk. 16. Staple all four flaps of the bag tightly against the stalk with one staple