植物营养与肥料学报2012，Vol.18Issue(1)：69-76,8.
超高产夏玉米根系时空分布特性
Temporal and spatial distribution characteristics of super-high-yield summer maize root
摘要
Abstract
The aim of this study is to investigate the temporal and spatial distribution characteristics of roots of super-high-yield summer maize by comparing root characteristics of different summer maize cultivars. High-yield cultivar, Denghai661 （DH661）, and normal-yield cultivar, Zhengdan958 （ZD958）, were selected as material. The differences in temporal and spatial distribution characteristics of roots of the two cuhivars in fields were studied using the soil profile sampling method. The results show that the dry root weight, TFC reducing capacity, TFC re- ducing quantity, absorbing area and active absorbing area of DH661 are all significantly higher （P 〈 0. 05 ） than those of ZD958 through the whole growth stages, and after the tasseling, the proportion of the dry root weight of DH661 are significantly higher （P 〈 0. 05 ） than that of ZD958 in the deep soil （60 -200 cm）. These results indi- cate that more water and nutrients are absorbed and transported by roots of super-high-yield DH661 which has the domination in root spacing distribution, number of roots in deeper layers, the effective touching area with soil and root activity at the later growth stages. As for DH661, it has a larger root system and stronger root function. The larger root system can increase root activity, deep root distribution and promote larger shoot development. All in all, because of the root characteristics, the DH661 can uptake more water and nutrients from the soil, promote the shoot growth well and supply the abundant filling matter. Therefore, DH661 can gain higher yield because it has abetter root system.关键词
超高产夏玉米/根系/时空分布特性Key words
super-high-yield summer maize/root/temporal and spatial distribution characteristics分类
农业科技引用本文复制引用
齐文增,刘惠惠,李耕,邵立杰,王飞飞,刘鹏,董树亭,张吉旺,赵斌..超高产夏玉米根系时空分布特性[J].植物营养与肥料学报,2012,18(1):69-76,8.基金项目
国家自然科学基金项目(31071358、30871476) （31071358、30871476）
欧盟FP7国际合作项目(NUE-CROPS222645) （NUE-CROPS222645）
国家"十二五"科技支撑计划(2011BAD16814) （2011BAD16814）
山东省财政支持农业重大应用技术创新课题(2010) （2010）
山东省良种工程玉米课题(2011)资助. （2011）
