Effect of Potassium Fertilizers on Cotton Yield and Nitrogen Uptake Efficiency in an Aridisol
Effect of Potassium Fertilizers on Cotton Yield and Nitrogen Uptake Efficiency in an Aridisol
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DOI：
10.1080/00103624.2012.639427
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发表时间：
2012-01-01
影响因子：
1.8
通讯作者：
Al-Ain, Farid
中科院分区：
文献类型：
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作者：
Khalifa, Khalaf;Al-Chammaa, Mohamad;Al-Ain, Farid
通过田间试验，研究了在增施氮肥（120、180和240 kg N ha（-1））的同时，不同钾肥用量（0、50、100和150 K2 O ha（-1））对棉花产量的影响。利用N-15同位素稀释技术测定了氮、钾的利用效率。钾肥对棉花产量有一定的增产作用，且施氮量越高（N3）增产效果越明显。N_2K_3处理棉花产量最高，达6442 kg/ha，比对照增产14%。施钾显著提高了N2和N3处理的氮素吸收效率。氮素吸收效率以N_2K_3处理最高，达98%。N3 K1处理的钾吸收效率最高，为42%。因此，在中高氮土壤上种植棉花时，施用钾肥可以提高棉花对氮素的吸收效率，从而提高棉花产量。
A field experiment was carried out to study the effect of different rates of potassium (K) fertilizer [0, 50, 100, and 150 potassium oxide (K2O) ha(-1)] in the presence of increased supply of nitrogen (N) (120, 180, and 240 kg N ha(-1)) on cotton (Gossypium hirsutum L.) yield and the N and K use efficiencies using the N-15 isotopic dilution technique. Potassium fertilizer increased cotton yield, which was significant and more pronounced with the application of N in the high level (N3). The greatest cotton yield (6442 kg ha(-1)) was obtained in N2K3 treatment with an increase of 14% over the control. In addition, K fertilizer significantly increased N uptake efficiency in the N2 and N3 treatments. The greatest N uptake efficiency (98%) was in N2K3 treatment. The greatest K uptake efficiency (42%) was occurred in N3K1 treatment. In conclusion, the use of K fertilizer could be useful when growing cotton in soils of moderate to high N content to improve N uptake efficiency and consequently increase cotton yield.