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作物学报

作物学报 ›› 2008, Vol. 34 ›› Issue (07): 1273-1279.

• 耕作栽培·生理生化 • 上一篇    下一篇

喷施和土施镧对圆叶决明生长影响的比较

姜照伟1,2;翁伯琦3,*;黄元仿1,*;王义祥3;应朝阳3   

  1. 1 中国农业大学资源与环境学院, 北京100094; 2 福建省农业科学院水稻研究所, 福建福州350019; 3 福建省农业科学院农业生态研究所, 福建福州350013
  • 收稿日期:2007-08-27 修回日期:1900-01-01 出版日期:2008-07-12 网络出版日期:2008-07-12
  • 通讯作者: 黄元仿

Comparison of Effects of Lanthanum Application on Growth by Spraying and Soil Dressing in Chamaecrista rotundifolia

JIANG Zhao-Wei12,WENG Bo-Qi3*,HUANG Yuan-Fang1*,WANG Yi-Xiang3,YING Zhao-Yang3   

  1. 1 College of Resources and Environment, China Agricultural University, Beijing 100094; 2 Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, Fujian; 3 Agriculture Ecology Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350013, Fujian, China
  • Received:2007-08-27 Revised:1900-01-01 Published:2008-07-12 Published online:2008-07-12
  • Contact: HUANG Yuan-Fang

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1226

被引次数

19

摘要： 以豆科牧草圆叶决明为材料, 采用盆栽试验比较喷施和土施镧对材料生长的影响。结果表明, 施镧能显著增加圆叶决明叶片的叶绿素含量、叶面积和干物重。在各取样时期, 圆叶决明地上部的干物重, 喷施处理以Y2 (500 mg L-1)最高, 比对照增加15.91%~20.03% (P＜0.05); 土施处理以Y8 (1 000 mg L-1)最高, 比对照增加14.28%~17.42% (P＜0.05)。在各取样时期, 圆叶决明根干物重, 喷施处理以Y2最高, 比对照增加19.88%~25.34% (P＜0.05); 土施处理以Y8最高, 比对照增加21.41%~27.03% (P＜0.05)。在同一施镧水平上, 喷施的干物质积累和土施的并无显著差异, 并且最高干物质积累的Y2和Y8处理之间也无显著差异。由此看来, 喷施效果更好, 使用量小, 更加经济和环保, 土施量比喷施量提高1~2倍即可。随着镧施用量的增加, 圆叶决明植株各部位的镧含量也增加。但土壤中镧的背景浓度较高, 施用量相对非常低, 圆叶决明吸收的量不多, 故施用前后土壤镧含量变化不大。

关键词: 镧, 圆叶决明, 生长, 生理特性

Abstract: Few studies have been concerned in physiological effects of REEs on forages, and the mechanism of action by rare earth elements (REEs) is still not clear. The studies on the action of REEs soil application to crop are still rare. A pot experiment was conducted to study the effects of spray application and soil application of lanthanum (La) on growth of leguminous grass Chamaecrista rotundifolia in order to provide theoretical reference for reasonable applications of REEs in agriculture. The results showed that both methods obviously increased the chlorophyll content of leaf, leaf area and dry matter weight of C. rotundifolia. At each sampling date, the shoot dry matter weight of Y2 treatment was the highest for spray application, with 15.91–20.03% (P<0.05) higher than the control. The shoot dry matter weight of Y8 treatment was the highest for soil application, with 14.28–17.42% (P<0.05) higher than the control. At each sampling date, the root dry matter weight of Y2 treatment was the highest for spray application, with 19.88–25.34% (P<0.05) higher than the control. The root dry matter weight of Y8 treatment was the highest for soil application, with 21.41–27.03% (P<0.05) higher than the control. At the same La application rate, the dry matter accumulation showed no significant difference between spray application and soil application. Furthermore, the highest dry matter accumulation also showed no significant difference between Y2 and Y8 treatments. Judging from this, spray application was more effective with lower application rate, lower cost and more environmental protection than soil application. The reasonable La ap-plication rate for soil application REEs was 1–2 times of that for spray application. The concentration of La in each part of C. rotundifolia plant increased with the increase of La application rate. The concentration of La in soil changed little, because the background concentration was high, the application rate was very low and the uptake rate by C. rotundifolia was low.

中图分类号: 

  • 10.3724/SP.J.1006.2008.01273
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