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作 者 ：刘文辉, 周青平, 贾志锋, 梁国玲

期 刊 ：植物营养与肥料学报 2010年 16卷 2期 页码：419-424

关键词：青引1号燕麦；钾肥；饲草产量；根系；

Keywords:Avena sativa cv. Qingyin No.1, potassium fertilizer, fodder yield, root system,

摘 要 ：在缺钾地区，开展了不同施钾对青引1号燕麦（Avena sativa cv. Qingyin No.1）干物质产量和根系的影响，找出最佳施钾量，为青海省燕麦种子生产提供依据。结果表明，在施N 54.75 kg/hm²和施P₂O₅ 51.75 kg/hm²的基础上，施K₂O 40 kg/hm²，青引1号燕麦开花期收获时可获得最高的干物质产量和蛋白产量，分别为29575.0和2099.8 kg/hm²，二者均符合Y=a+bK+cK²函数变化。施K₂O 40 kg/hm²，青引1号燕麦株高、总分蘖数、根长和根数最大，分别为184.5 cm、3.22个/株、15.90 cm和26.17 条/株； 施K₂O 20 kg/hm²时，植株茎粗和根量达最大，分别为0.585 cm和0.540 g/株。各产量性状、地下生物量以及饲草和蛋白产量间均存在显著或极显著正相关关系。

Abstract:Effects of potassium fertilization on dry matter yield and root system of Avena sativa cv. Qingyin No.1 were studied to optimize the potassium application for oats production in a potassium deficient area. The results show that the optimum fodder and protein yields of the cultivar are 29575.0 kg/ha and 2099.8 kg/ha respectively at the blossom stage under the N 54.75 kg/ha, P₂O₅ 51.75 kg/ha and K₂O 40 kg/ha fertilization. Relation between dry matter, protein yield and K application can be described as Y=a+bK+cK². Under the K₂O 40 kg/ha treatment, the plant height, tiller, root length and root number of the cultivar are the highest, are about 184.5 cm, 3.22 till/plant, 15.90 cm and 26.17 roots/plant, respectively. Under the 20 kg/ha K₂O fertilization, diameter of stem and root weight are the highest, 0.585 cm and 0.540 g/plant, respectively. There are significant correlations between above-ground, under-ground yields and fodder, protein yields.

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