Effects of different potassium rates on potassium absorption and utilization by maize plant

• Published in: Yu mi ke xue Vol. 16; no. 4
• Main Authors: Liu Shuxia, Wu Haiyan, Zhao Lanpo
• Format: Journal Article
• Language: Chinese
• Published: 01.08.2008
• Subjects: ABSORCION; ABSORPTION; http://www.fao.org/aos/agrovoc#c_12332; http://www.fao.org/aos/agrovoc#c_27; http://www.fao.org/aos/agrovoc#c_6139; MAIS; MAIZ; MAIZE; POTASIO; POTASSIUM
• ISSN: 1005-0906

采用田间试验研究了不同施钾量对玉米钾素吸收利用的影响。结果表明：玉米产量随钾肥用量提高呈缓慢上升趋势。当钾肥用量达156kg/hm. 时玉米产量最高，为11177kg／hm. ，与不施钾肥处理相比增产20．53％，产量差异达显著水平；不同施钾处理玉米收获后土壤速效钾含量比播种前有所降低，土壤缓效钾随钾肥施用量的增加而明显提高，土壤全钾含量变化不大；不同施钾处理，随着钾肥的施用量提高，玉米从土壤中带走钾量明显增加，当钾肥施用量在117kg／hm. 以下时，土壤中的钾素亏损，不能保持土壤中钾素平衡；各处理玉米子粒中钾素含量均比其茎秆钾素含量低，随着钾肥施入量的增加，子粒茎秆中钾素含量也相应增加；不同施钾处理，钾素的利用率随钾肥的施用量的增加而减少。[著者文摘] This paper used the method of field experiment, analysis and different application of potassium fertilizer for black.soil region of middle of Jilin to study the effects of use of nitrogen from maize. The results showed that the output increased slowly with the dosage of potash fertilizer through different ways. When the dosage of potash fertilizer was 156kg/ha, the output of maize was highest. The highest output was 11 177 kg/ha. Compared with NPK0 disposing, the output was increasing by 20.53%, and production volume variance reached significance level. Cultivated land soil available potassium content was lower than pre-sow, ing, with the increasing of potassium application rate, th