| 风沙区农田土壤钾素状况及玉米钾肥效应的研究 |
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| 作者姓名： | 岳桂华 |
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| 作者单位： | 辽宁省阜新高等专科学校,辽宁阜新,123000 |
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| 摘 要： | 通过对辽宁省北部风沙区农田土壤的钾素状况及固钾力的分析研究，发现该区土壤中，全钾含量为20～30g／kg，属较高水平；速效钾、缓效钾含量均处于较低水平，分别为35．6～71．4mg／kg、213．3～376．5mg／kg；固钾率为21％～66％。钾肥田间试验表明：玉米施用钾肥能刺激苗期次生根的生成，提高苗期的生长量，增强抗旱、抗土壤不良环境的能力，提高籽实的千粒重、穗粒数，增产效果显著，但肥效受当年的气候影响较大。
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| 关 键 词： | 半干旱 钾 玉米 |
K-availability and effect of fertilization on corn in semi-arid sandy area |
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| Authors: | Yue GuiHua |
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| Institution: | Fu Xin higher training college in Liaoning province, Liaoning Fuxin 123000 |
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| Abstract: | Studies revealed that the farmland soil in semi-arid area of northwestern Liaoning, had a high amount of potassium, 20-30g/kg in total,but with a low level of availability. It had 35.6-71.4 mg/kg quick-acting K, 213.3-376.5 mg/kg slow-acting K,with power of fixation 21-66%. Field results on corn showed that application of K fertilizer could promote the development of secondary roots and growth of seedlings, increase thousand-seed weight, and number of ear and seed, resulting in significant increase of output. The effectiveness was largely dependent on rainfall. |
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| Keywords: | Potassium Corn Semi-arid |
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