氮肥用量和采采间隔对卢旺达泥炭地和高原多质土壤茶叶产量的影响

Wilson Dufitumukiza, P. Owuor, J. Bigirimana, Ange R. Akingeneye, Balthazar Murenzi
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引用次数: 1

摘要

在卢旺达,茶叶种植在不同的农业生态系统中,包括高地和排水的低海拔泥炭地。这些种植园使用从东非国家进口的统一农业做法,但没有重新测试其适用性。这些做法包括氮肥的使用和收获,这是茶叶种植中最昂贵的农艺投入。茶农需要对这些做法进行优化,以实现最大的茶叶产量。利用TRFK 6/8无性系在Kitabi和Mulindi进行了为期8年的试验,以评价氮肥用量和采采间隔对茶叶产量的影响。施氮量(NPKS 25:5:5:3)分别为0、75、150、225和300kg N/ha/年,采采间隔分别为7、14和21 d。基塔比的茶叶产量高于穆林迪(p <或等于0.05),这意味着卢旺达的茶叶产量因生产的地理区域而异。尽管施氮量增加了平均场址产量(p <或等于0.05),但两个场址之间的响应有所不同。在Kitabi,年产量随施氮量的增加而增加(p <或等于0.05),最高产量为225 N ha/年。在Mulindi,仅在一年内观察到对氮浓度的显著(p小于或等于0.05)反应。因此,在基塔比施用化肥是必要的,而在穆林迪,氮肥的使用几乎没有带来任何好处。在8年中,两个地点的采收间隔越短,产量越高(p <或等于0.05)。因此,缩短采摘间隔可以提高卢旺达的茶叶产量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of Nitrogenous Fertilizer Rates and Plucking Intervals on Tea in Peatland and Highland Ultisol Soils of Rwanda: 1 Tea Yields
Tea in Rwanda, is grown in different agro-ecosystems comprising highlands and drained low elevation peatlands. The plantations use uniform agricultural practices imported from Eastern Africa countries, but without re-testing for suitability. The practices include nitrogenous fertilizer use and harvesting, which are most expensive agronomic inputs in tea cultivation. These practices need optimization for tea the growers to realise maximum tea production. Trials were conducted for eight years using clone TRFK 6/8 fields in Kitabi and Mulindi to evaluate influence of nitrogen fertiliser rates and plucking intervals on tea yields. Nitrogen (NPKS 25:5:5:3) rates used were 0, 75, 150, 225 and 300kg N/ha/year and plucking intervals were 7, 14 and 21 days. Tea yields were higher (p less than or equal to 0.05) in Kitabi than in Mulindi, implying tea productivity in Rwanda vary with geographical region of production. Although mean site yields demonstrated increase (p less than or equal to 0.05) with nitrogenous fertiliser rates, responses varied between the two sites. At Kitabi, annual yields increased (p less than or equal to 0.05) with nitrogen rates, peaking at 225 N ha/year. At Mulindi, significant (p less than or equal to 0.05) response to nitrogen rates was observed in only one year. Application of fertiliser was therefore necessary in Kitabi, while in Mulindi, little benefit was realised from nitrogen fertiliser use. Yields increased (p less than or equal to 0.05) with short plucking intervals at both sites throughout the eight years. Shortening plucking intervals can therefore improve tea production in Rwanda.
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