蒂莫西草和草甸羊茅在5个物候阶段的再生速率

IF 1.7 4区 农林科学 Q2 AGRONOMY Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1999-12-01 DOI:10.1080/713782028
H. Bonesmo, A. Skjelvåg
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引用次数: 18

摘要

采用6个不同施氮水平的草地羊茅(Festuca pratensis Huds.)和蒂木草(Phleum pratense L.)田间试验,研究了第一次采伐物候期与随后再生长率的关系。实地地点的选择涵盖了挪威广泛的气候条件。在再生期间的5个周产量样本拟合到一个指数生长方程中,以确定初始最大相对再生速率(R m)和最大再生速率(C m)。从实际速率到潜在速率的步骤是通过将获得的速率与天气指数加权来完成的。两种植物的R m均在营养早期初切后最高。在节理时减少了50%,之后的切割没有变化。在物候发育的早期阶段,两种植物的碳含量都随着时间的缩短而急剧下降,而从抽穗早期到开花阶段,碳含量变化不显著。与蒂莫西相比,C . m .……
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Regrowth Rates of Timothy and Meadow Fescue Cut at Five Phenological Stages
The relationship between phenological stage at the first cut and subsequent regrowth rates was studied in six field experiments with timothy (Phleum pratense L.) and meadow fescue (Festuca pratensis Huds.) under two levels of N application. The field sites were selected to cover a wide range of climatic conditions in Norway. Five weekly yield samplings during the regrowth periods were fitted to an expolinear growth equation to determine initial maximum relative regrowth rates (R m) and maximum regrowth rates (C m). The step from actual to potential rates was accomplished by weighting the obtained rates with a weather index. For both species R m was highest after an initial cut at the early vegetative stage. It was reduced by 50% at jointing, after which there was no change with later cuts. For both species the C m declined sharply with cutting time through the early stages of phenological development, whereas from early heading to anthesis there was no significant change. Compared with timothy, the C m va...
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来源期刊
CiteScore
4.40
自引率
0.00%
发文量
56
审稿时长
2.3 months
期刊介绍: Acta Agriculturæ Scandinavica Section B publishes original research in applied soil and plant science with special attention given to to crop production in agri- and horticultural systems. We welcome manuscripts dealing with: Climate smart and sustainable crop production systems Water and nutrient efficiency Soil conservation and productivity Precise agriculture systems Applications of bio- and nanotechnology Digitalisation and robotics Soil-plant interactions Acta Agriculturæ Scandinavica, Section B – Soil & Plant Science forms part of a series of titles published on behalf of the Nordic Association of Agricultural Science (NJF). The series also includes Section A - Animal Science .
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