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首页> 美国卫生研究院文献>Ecology and Evolution >Effect of enclosure on reproductive allocation of wheatgrass Agropyron mongolicum populations in desert steppes
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Effect of enclosure on reproductive allocation of wheatgrass Agropyron mongolicum populations in desert steppes

机译：围封对荒漠草原小麦草沙生蒙古种群繁殖分配的影响

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摘要

Plants generally adopt different reproductive strategies to adapt to their environments and increase their fitness. Here, we studied the effects of enclosure cultivation on the reproductive allocation of a wheatgrass species in the Desert steppes of Northern China. The results showed that: (a) after enclosure cultivation, the height, clump width, coverage, and clump biomass of significantly increased by 78.96% (  = .040), 63.50% (  = .013), 50.89% (  = .032), and 205.38% (  = .022), respectively, whereas density did not show a significant change (  = .330). (b) Enclosure cultivation significantly affected the biomass of . Compared with cultivation outside the fence, root, leaf, and spike biomass of inside the fence significantly increased by 183.52% (  = .020), 334.09% (  = .011), and 381.25% (  = .005), respectively. In addition, root biomass was the highest among the components (38.53 and 13.59 g inside and outside the fence, respectively) and spike biomass was the lowest (6.16 and 1.28 g inside and outside the fence, respectively). (c) Enclosure cultivation affected elemental nutrient allocation and the caloric values of various components of , and the caloric values are positively correlated with carbon, nitrogen, and phosphorus contents. Enclosure cultivation significantly reduced carbon, nitrogen, and phosphorus in the roots, as well as nitrogen and phosphorus in the spikes, but significantly increased nitrogen in the spikes by 9.78%. The caloric values of inside and outside the fence in decreasing order were as follows: spikes > leaves > stems > roots. Comparison of cultivation effects between inside and outside the fence showed that the caloric values of the spikes and roots significantly increased by 0.92% and 1.60%, respectively, whereas those of the leaves significantly decreased by 0.70%. Our results demonstrate that the reproductive allocation of elemental nutrients and caloric values in nonreproductive and reproductive organs are plastic to arid environments.
机译：植物通常采用不同的繁殖策略来适应其环境并提高其适应性。在这里，我们研究了封闭式栽培对中国北方荒漠草原小麦草物种繁殖分配的影响。结果表明：（a）圈养后，高度，团块宽度，覆盖率和团块生物量显着增加了78.96％（= .040），63.50％（= .013），50.89％（=。032）和分别为205.38％（= .022），而密度没有显示出显着变化（= .330）。 （b）圈地栽培显着影响了大豆的生物量。与围栏外种植相比，围栏内的根，叶和穗状生物量分别显着增加了183.52％（= .020），334.09％（= .011）和381.25％（=。005）。此外，根生物量最高（在围栏内外分别为38.53和13.59 g），峰值生物量最低（在围栏内外分别为6.16和1.28 g）。 （c）围栏栽培影响元素养分分配和各个成分的热量值，热量值与碳，氮和磷含量呈正相关。封闭栽培显着减少了根中的碳，氮和磷以及尖峰中的氮和磷，但使尖峰中的氮显着增加了9.78％。围栏内外的热量值按降序排列如下：尖峰>叶>茎>根。围栏内外的栽培效果比较表明，穗和根的热值分别显着增加了0.92％和1.60％，而叶子的热值显着减少了0.70％。我们的结果表明，非生殖和生殖器官中元素营养的生殖分配和热量值对干旱环境具有可塑性。

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