摘要
为了探明旱稻锌吸收分配的规律,本试验通过对两个旱稻供试品种(旱稻502和巴西陆稻)进行不同供锌水平(0.0、0.1、0.5、2.5、5.0、10.0 mg/kg)处理的盆栽试验,研究了锌肥供给水平对旱稻锌吸收分配和干物质积累的影响。结果表明:在适宜锌用量范围内,随着施锌量的增加,供试品种地上部干物重均呈增加趋势,其中在Zn 5.0 mg/kg水平下,旱稻502和巴西陆稻地上部生物量达到最大值。但过多锌肥对旱稻生长有抑制作用。在外界锌源充足条件下,旱稻对锌的吸收积累表现为奢侈吸收,多余的锌分配主要贮存在叶鞘中。从总体上看,根和叶鞘中的锌含量明显比叶片中的高,并且随着锌肥供给水平的增加,根和叶鞘中的锌含量上升显著,而叶片锌含量则增加相对缓慢。
In this research, the effects of Zn application on plant growth and Zn distribution were examined in two cult vats of aerobic flee under pot soil culture condition with six zinc supplied level. Both Zn deficiency and Zn toxicity affected plant growth, and reached the highest value at 5.0 mg/kg soil for both varieties. Excessive Zn application rates led to a dry matter decrease of 24.6% in Baxi Ludao. With increasing soil Zn supplied level, plants continued to take up Zn even beyond toxicity level, and the extra zinc was found to mainly store in sheath. Among .all individual plant organ, leaf zinc mass fraction was lowest, and keep relatively stable with zinc applied increased, instead of sharply rising like root and sheath.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2006年第3期40-43,共4页
Soil and Fertilizer Sciences in China
关键词
早稻
锌吸收
分配
aerobic rice
zinc uptake and distribution
Zn mass fraction
