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不同钾肥品种和用量对甘蓝产量、品质和养分吸收利用的影响 被引量:7

Effects of Different K Source and Applying Dosage on Yield,Quality and Nutrient Absorption on Cabbage
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摘要 以俄罗斯产KC l和K2SO4、新疆罗布泊产K2SO4、开封产K2SO4为试材,比较了不同钾肥品种和罗布泊产K2SO4不同用量在热带和墨玉两个甘蓝品种上的应用效果。结果表明:施用钾肥可以增加甘蓝产量、蛋白质及VC含量,降低硝酸盐含量。在钾肥用量为300 kg.hm-2时,罗布泊产K2SO4的施用效果好于或接近其他钾肥品种,俄罗斯产K2SO4和开封产K2SO4施用效果最差。随着施钾量的增加,蛋白质含量变化不显著,VC含量增加,硝酸盐含量下降。施钾后热带产值提高29.9%~33.2%,墨玉产量提高15.8%~20.5%。利用回归方程求得热带的经济最佳钾肥用量为354.0 kg.hm-2,最高产值为98 463.4元.hm-2;墨玉经济最佳钾肥用量为333.0 kg.hm-2,最高产值为98 201.2元.hm-2。 Taking KCI and K2SO4 produced in Russia, Luobupu K2SO4 produced in Xinjiang and K2SO4 produced in Kaifeng as experimental materials, the experiment was carried out to study the effects of different K sources and applying dosage on cabbage varieties of ' Redai' and ' Moyu'. The results showed: potassium application could increase cabbage yield, the content of protein and VC, decrease the content of nitrate. When the amount of K application was 300 kg ·hm-2, the effects of Luobupu K2SO4 was better than or close to the other K sources. K2SO4 produced in Russia and K2 SO4 produced in Kaifeng had the worst effect. Potassium application increased ' Redai' output value by 29.9 % - 33.2 %, and that of ' Moyu' by 15.8 % -20. 5 %. Utilizing return equation, it gained the best economical potassium application for ' Redai' was 354.0 kg ·hm-2, the highest output value was 98 463.4 Yuan ·hm-2 ; that for ' Moyu' was 333.0 kg ·hm-2 and the highest output value was 98 201.2 Yuan ·hm-2
出处 《中国蔬菜》 北大核心 2009年第20期40-45,共6页 China Vegetables
基金 公益性行业(农业)科研专项(200803030) 农业部"948"重大项目(2006-G60)
关键词 钾肥 甘蓝 产量 VC 硝酸盐 经济效益 Potash fertilizer Cabbage Yield VC Nitrate Economic benefit
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