黑土农田养分平衡与养分消长规律
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* 中国科学院知识创新项目(KZCX2-413-3)资助


LAW OF NUTRIENT EQUILIBRIUM, GAIN AND LOSS IN BLACK SOIL FARMLAND
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    摘要:

    通过11年的定位试验结果表明,典型黑土农田11年不施N肥,N素的自然供给力由92%下降到50%~60%;不施P肥,P素的自然供给力由98%下降到80%~90%;不施钾肥,K素的自然供给力也由100%缓慢下降接近90%.农田养分平衡盈亏及其变化决定了土壤养分消长规律,其中有效磷的消长与P素盈亏的相关模型为Y=2.895+0.134x,速效钾的消长与K素盈亏的相关模型为Y=18.81+0.163x.

    Abstract:

    Results of an 11 year fixed experiment indicated that the spontaneous nutrient supplying capacity of the typical black soil farmland tested varied in the following way, its N supplying capacity declined from 92% to 50%~60% in the plot without nitrogenous fertilizer, its phosphorus supplying capacity decreased from 98% to 80%~90% in the plot of no phosphorous fertilizer, and its potassium supplying capacity dropped slowly from 100% to about 90% in the plot of no potassium fert ilizer. Nutrient equilibrium of the soil and its changes controlled nutrient gain or loss in the farmland The correlation coefficient of the model between gain and loss of available phosphorus and of total phosphorus is Y= 2.895+0.134X, the correlation coefficient of the model between gain and loss of readily available potassium and of total potassium is Y= 18.81+0.163X.

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王建国,刘鸿翔,王守宇,韩晓增.黑土农田养分平衡与养分消长规律[J].土壤学报,2003,40(2):246-251. DOI:10.11766/trxb200107020213 Wang Jian-guo, Liu Hong-xiang, Wang Shou-yu, Han Xiao-zeng. LAW OF NUTRIENT EQUILIBRIUM, GAIN AND LOSS IN BLACK SOIL FARMLAND[J]. Acta Pedologica Sinica,2003,40(2):246-251.

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  • 收稿日期:2001-07-02
  • 最后修改日期:2002-03-29
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  • 在线发布日期: 2013-02-25
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