| 词汇 | defoliation |
| 释义 | defoliation noun[ U ] uk /ˌdiː.fəʊ.liˈeɪ.ʃən/ us /ˌdiː.foʊ.liˈeɪ.ʃən/ the process of leaves falling off a plant, or of making this happen: （尤指因使用强效化学品而出现的）落叶，凋零 Defoliation occurred when the plants were nearly mature.落叶发生在植物接近成熟时。 Over 64 per cent of all tree species have slight to severe defoliation.所有树种中超过64%有轻微到严重的落叶现象。 See defoliate The sand and low shrubs were obviously a result of repeated chemical defoliation. Trees can withstand gypsy moth defoliation for two or three years without dying. Complete defoliation of the immediate area would lead to deteriorating conditions for the ants. Removing and getting rid of things abandonment banish be scattered to the four windsidiom bin cast someone/something aside/away/off dumping eradication of something erase erasure evacuate evacuate someone from something evacuation shedding shoo shrug shrug something off shuck sling toss turf Examples of defoliationdefoliation The effects of artificial defoliation on leaf chemistry were monitored. In the case of insects that cause defoliation in both natural forests and plantations, outbreaks are most likely to occur in plantations. All surviving defoliated plants produced flowers irrespective of the level of defoliation. As defoliation was conducted after tassel initiation, tasselling and silking were not delayed by defoliation. Increment cores were sampled for radial growth measurements from trees subjected to slight, moderate and heavy defoliation. Defoliation of sorghum and wheat leads to control of phenology and enhanced water use efficiency. This study shows that, under well-watered conditions, defoliation resulted in either yield reduction or no significant yield change. In 1996-97, defoliation was evident in 100% of plants resulting in 96% leaf area loss. Under anticipated drought stress, defoliation could be an important management practice to reduce drought-induced yield decrease, but this needs to be tested under field conditions. So, for palms, defoliation might not be a direct cause of plant mortality. Heavy defoliations due to late leaf spot, however, were observed for the 2003 rainy and the 2003 dry season. An assessment of techniques for measuring herbivory: is rainforest defoliation more intense than we thought? Early spring defoliation patterns can condition the sward for mid-season growth by promoting leafier herbage with fewer reproductive tillers. This lack of effective defoliation also required slower harvest machinery operation, and occasional repeated mechanical pickings. The decrease in production was mainly caused by increased abscission of fruiting for ms (squares and young bolls) after defoliation. See all examples of defoliation These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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