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首页> 外文期刊>European Journal of Agronomy >Biomass production and N balance of giant reed (Arundo donax L.) under high water and N input in Mediterranean environments
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Biomass production and N balance of giant reed (Arundo donax L.) under high water and N input in Mediterranean environments

机译：高水和高氮输入下地中海环境中巨型芦苇（Arundo donax L.）的生物量生产和氮平衡

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摘要

This study aimed to evaluate the productivity of Arundo donax under good water and N availability coming from non-conventional sources, in different Italian environments (Padova and Bologna in the north, Reggio Calabria and Catania in the south) in relation to three harvest periods (autumn; mid-winter; late-winter). In the northern locations A. donax had already reached maximum productivity the year after transplanting, with 85 and 98 t ha(-1) of dry matter at Padova and Bologna, respectively. At Reggio Calabria and Catania a further biomass increase was obtained from the second to third year of cultivation, when production was 62 t ha(-1) and 51 t ha(-1), respectively. The average dry matter production was 74, 66 and 65 t ha(-1) with autumn, mid-winter and late-winter harvesting, respectively. Under N input ranging from 225 to 329 kg ha(-1) year(-1) at the different locations, the apparent N balance (input-output) was negative except in Catania indicating a great potential of A. donax to provide high N uptake, which would be a useful feature in environments under the European Nitrates Directive
机译：这项研究旨在评估在三个不同的收获季节（不同的意大利环境（北部的帕多瓦和博洛尼亚，南部的雷焦卡拉布里亚和卡塔尼亚））下，来自非常规来源的优质水和氮的有效利用条件下，芦竹的生产力。秋天;冬季中旬;冬季末）。在北部地区，don虫在移植后的第二年就已经达到了最高生产力，在帕多瓦和博洛尼亚分别有85和98吨公顷（-1）的干物质。在雷焦卡拉布里亚和卡塔尼亚，从种植的第二年到第三年，当产量分别为62 t ha（-1）和51 t ha（-1）时，生物量进一步增加。秋季，冬中和冬末分别收获的平均干物质产量分别为74、66和65 t ha（-1）。在不同地点的N输入范围为225至329 kg ha（-1）年（-1）时，除卡塔尼亚以外，表观N平衡（输入-输出）为负，表明A. donax具有提供高N的巨大潜力。吸收，这在欧洲《硝酸盐指令》的环境中将是一个有用的功能

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