期刊论文

中文

植物营养与肥料学报

1008-505X

2004

10

1

6-11

10.3321/j.issn:1008-505X.2004.01.002

G1999011707:国家重点基础研究发展计划（973计划） 49890330:国家自然科学基金 30230230:国家自然科学基金 30070429,40201028:国家自然科学基金

本校为其他机构

在限制根系生长的胁迫条件下,研究了补充和不补充供应水、氮对玉米根系生理特性及养分吸收的影响.结果表明,正常生长条件下,水、氮供应促进了根系生长,增加了根系吸收总面积、活跃吸收面积和TTC还原量,促进了根系对养分的吸收,从而提高了产量; 限制根系生长,水分的作用与正常条件下相同,氮素的作用则受控于土壤水分.补充灌水增强了氮肥作用,供氮促进了根系生长,改善了根系生理特性,减少了限制根系生长所引起的不良影响; 不补充灌水限制了氮肥作用的发挥,供氮导致了根系生物量和生理特性下降,加重了限制根系生长的不良影响.

Effects of supplemental supply of water and N upon maize root physiological characteristics and nutrient uptake were studied under a condition of limited root-grown space. Results showed that under anormal root-grown condition, supply of water and N stimulated root growth, increased total root absorbing area, enhanced actively absorbing area and TTC-reducing amounts, promoted nutrient uptake, and finally led to crop yield increase. Water function to roots grown in a limited space was similar to those grown under a normal condition while N function was controlled by water supply. Supplemental i...