cold stratification造句

例句与造句

1. The seeds require two months of cold stratification before use.
2. Cold stratification is the term applied to storage at near-freezing temperatures, even if no medium is used.
3. Seeds need cold stratification, to germinate.
4. The seed requires two to three months cold stratification and is best sown in a cold frame as early in winter as possible.
5. "Sclerocactus " seeds are difficult to germinate as they contain inhibitors, and require cold stratification, prolonged soaking, or scarification of the seeds to trigger germination.
6. It's difficult to find cold stratification in a sentence. 用cold stratification造句挺难的
7. Cold stratification of white spruce seed to break dormancy has been specified as a requirement, but Heit ( 1961 ) and Hellum ( 1968 ) regarded stratification as unnecessary.
8. In many instances, warm stratification followed by cold stratification requirements can also be met by planting the seeds in summer in a mulched bed for expected germination the following spring.
9. A common method of cold stratification, is to soak seed in tap water for up to 24 h, superficially dry it, then store moist for some weeks or even months at temperatures just above freezing.
10. Cold stratification is the term applied to the storing of seeds in ( and, strictly, in layers with ) a moist medium, often peat or sand, with a view to maintaining viability and overcoming dormancy.
11. Any seeds that are indicated as needing a period of warm stratification followed by cold stratification should be subjected to the same measures, but the seeds should additionally be stratified in a warm area first, followed by the cold period in a refrigerator later.
12. Soaking the seeds in cold water for 6 12 hours immediately before placing them in cold stratification can cut down on the amount of time needed for stratification, as the seed needs to absorb some moisture to enable the chemical changes that take place.
13. In nurseries, " Taxodium " seeds show an apparent internal dormancy that can be overcome by various treatments, usually including cold stratification or submerging in water for 60 days . Nursery beds are sown in spring with pretreated seeds or in fall with untreated seeds.
14. Although Hellum ( 1968 ) found that cold stratification of an Alberta seed source led to irregular germination, with decreasing germination with increasing length of the stratification period, Hocking's ( 1972 ) paired test with stratified and nonstratified Alberta seed from several sources revealed no trends in response to stratification.