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Sunflower response to potassium fertilization and nutrient requirement estimation

文献类型： 外文期刊

作者： Li Shu-tian 1 ; Duan Yu 3 ; Guo Tian-wen 4 ; Zhang Ping-liang 4 ; He Ping 1 ; Majumdar, Kaushik 5 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

2.Int Plant Nutr Inst, Beijing Off, Beijing 100081, Peoples R China

3.Inner Mongolia Acad Agr & Anim Husb Sci, Inst Resources Environm & Detect Technol, Hohhot 010031, Peoples R China

4.Gansu Acad Agr Sci, Dryland Agr Inst, Lanzhou 730070, Gansu, Peoples R China

5.IPNI, Gurgaon 122001, India

关键词： sunflower; potassium; yield response; K use efficiency

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2018 年 17 卷 12 期

页码：

收录情况： SCI

摘要： Field experiments were conducted in oil and edible sunflower to study the effects of potassium (K) fertilization on achene yield and quality, and to estimate the nutrient internal efficiency (IE) and nutrient requirement in sunflower production. All trials in edible sunflower and 75% trials in oil sunflower showed positive yield responses to K fertilization. Compared with control without K fertilization, the application of K increased achene yield by an average of 406 kg ha(-1) for oil sunflower and 294 kg ha(-1) for edible sunflower. K application also increased 1 000-achene weight and kernel rate of both oil and edible sunflower. K fertilization improved the contents of oil, oleic acid, linoleic acid and linolenic acid in achenes of oil sunflower, and increased contents of oil, total unsaturated fatty acid and protein in achenes of edible sunflower. The average agronomic efficiency of K fertilizer was 4.0 for oil sunflower and 3.0 kg achene kg(-1) K2O for edible sunflower. The average IE of N, P and K under balanced NPK fertilization was 22.9, 82.8, and 9.9 kg kg(-1) for oil sunflower, and 27.3, 138.9, and 14.3 kg kg(-1) for edible sunflower. These values were equivalent to 45.5, 14.1, and 108.1 kg, and 39.0, 8.0, and 71.7 kg of N, P and K, respectively, in above-ground dry matter required for production per ton of achenes. The average harvest index of N, P and K was 0.47, 0.56 and 0.05 kg kg(-1) in oil sunflower, and 0.58, 0.58 and 0.14 kg kg(-1) in edible sunflower.

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