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施钾对紫色土稻麦产量及土壤钾素状况的影响

EFFECTS OF LONG-TERM POTASSIUM APPLICATION ON YIELD AND SOIL POTASSIUM IN RICE-WHEAT CROPPING SYSTEM IN PURPLE SOIL

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【作者】 熊明彪舒芬宋光煜石孝均毛知耘

【Author】 Xiong Ming biao 1 Shu Fen 2 Song Guang yu 1 Shi Xiao jun 1 Mao Zhi yun 1 (1 College of Resources and Environment, Southwest Agricultural University, Chongqing 400716,China) (2 Station of Agrotechnique and Service, Hechuan, Chongqing 401538,China)

【机构】 西南农业大学资源环境学院重庆市合川农业技术服务站西南农业大学资源环境学院 重庆400716重庆401538重庆400716重庆400716

【摘要】 通过 9年定位试验 ,研究了水稻—小麦轮作中 ,连续施用钾肥对紫色土钾素形态、含量变化及钾肥产量效应的影响。结果表明 ,长期施钾明显提高稻麦产量 ,维持紫色土有效钾库的平衡 ,提高并保持土壤的持续供钾能力 ;在每年 75 0 0kghm- 2 稻秆还田的基础上 ,每季配施 70kghm- 2 (K2 O)左右的化学钾肥是维持紫色土土壤钾库平衡的有效措施。

【Abstract】 Summary Effects of long term K application on crop yield and soil K content and forms in rice wheat rotation were studied. The results showed that long term K application markedly increased crop yield, the balance of the available K in purple soil was maintained and the ability of soil to supply K was raised. A joint application of rice straw (7 500 kg hm -2 a -1 ) and chemical K fertilizer (about K 2O 140 kg hm -2 a -1 ) is recommended to keep the balance of K in purple soil.

  • 【文献出处】 土壤学报 ,Acta Pedologica Sinica , 编辑部邮箱 ,2003年02期
  • 【分类号】S147
  • 【被引频次】52
  • 【下载频次】314
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