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首页> 外文期刊>European Journal of Agronomy >Sowing date and nitrogen rate effects on growth, yield and yield components of two summer rapeseed cultivars
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Sowing date and nitrogen rate effects on growth, yield and yield components of two summer rapeseed cultivars

机译:播期和施氮量对两个夏季油菜品种生长,产量和产量构成的影响

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Rapeseed (Brassica napus L.) has potential to become an alternate oilseed crop in eastern Anatolia, Turkey. Information on sowing date and nitrogen rate for rapeseed is not available in this region. Therefore, a study was initiated to investigate the effects of sowing date and nitrogen rate on the yield and agronomic characteristics of two genotypes of spring rapeseed (Tower and Lirawell) in Erzurum, eastern Anatolia, during 1994 and 1995. Four sowing dates were established at about 10-day intervals from mid April to lately May (19 April, 29 April, 9 May, and 18 May 1994; and 29 April, 9 May, 18 May, and 27 May 1995). Four N fertilizer rates established; 0, 80, 160, and 240 kg N ha (-1). In both years, there were effects on plant growth, yield, and yield components due to sowing dates, nitrogen rates, and cultivars. Cultivars tended to respond similarly to sowing date and nitrogen rate for seed yield in both years of the study. In general, early sowings gave higher yields than late sowings in both years, except the first sowing (9 April) in 1994 growing season. From this study, it appears that seeding rapeseed from 29 April to 9 May gives a greater assurance for higher yields. The present results highlight the practical importance of adequate N fertilization in yield formation in summer oilseed rape and suggest that the rate of 160 kg N ha(-1) will be about adequate for the crop to meet its N requirements. The yield differences measured for both sowing dates and nitrogen rates were primarily due to the changes in branch numbers, pod numbers per plant, and 1000 seed weights.
机译:油菜籽(Brassica napus L.)有潜力成为土耳其安纳托利亚东部的替代油料作物。该地区没有有关油菜的播种日期和氮含量的信息。因此,开始了一项研究,以调查播种期和施氮量对1994年和1995年在安那托利亚东部地区埃尔祖鲁姆的两个基因型(油菜和里拉韦尔)春油菜的产量和农艺特性的影响。确定了4个播种日期。从4月中旬到5月下旬(1994年4月19日,4月29日,5月9日和5月18日以及1995年4月29日,5月9日,5月18日和1995年5月27日)间隔大约10天。确定了四个氮肥施用率; 0、80、160和240 kg N ha(-1)。在这两年中,由于播种日期,氮素含量和品种的不同,对植物的生长,产量和产量构成部分都有影响。在这两年的研究中,品种对播种期和氮素含量的籽粒产量趋向相似。一般而言,除了1994年生长季节的第一次播种(4月9日)外,这两个年份的早播都比晚播高。从这项研究中可以看出,从4月29日至5月9日播种油菜籽可为更高的产量提供更大的保证。目前的结果凸显了在夏季油菜油菜中充分施氮对产量形成的实际重要性,并表明160 kg N ha(-1)的施肥量足以满足其氮需求。在播种期和氮素含量方面测得的产量差异主要归因于枝条数,单株荚果数和1000种子重量的变化。

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