Breeding of a maize hybrid Zhenghong 2;

Genotype differences on nitrogen use efficiency among maize hybrids;

Grey correlative degree analysis of yield and yield component factors for maize hybrids of Yunnan province;

Root growth, nitrogen uptake and yield formation of hybrid maize with different N efficiency;

The results of the experiment from ten different sites in five mountain-ious coupties show that all five hybrid maize "Gui Bi" series can increase the out-put of corn in mountain area.

Abstract: This study is carried out on Gansu Agriculture Technology College’s Heping Farm, taking the four local main hybrid maize ( Zhongdan 2, Yuyu 22, Shendan 10, Funong 998) as the studying subject, with Zhongdan 2 as the antitheses.

Danyu99(Dan6012) is a medium late maize hybrid bred in Dandong Academy of Agricultural Sciences in 2001 with the self bred inbred line Dan9942 as the female parent and the self bred inbred line Dan99 as the male parent.

The hybrid was tested in the pre-test of the regional test of late mature maize hybrid of Liaoning province in 2003 and was tested in the regional and productive test of the late mature maize hybrid of Liaoning province in 2004 and 2005.

The breeding and selection of corn hybrid Zhongzhong 868;

Cultivation and breeding technology of the Corn hybrid Jiudan 64;

A method was used to isolate starches from 17 normal corn hybrids in latoratory.

Maize single cross hybrids“yundan”series i.

Maize single cross hybrids Yundan series of Jindan 39,Jindan 46,Yundan 19,Yungaoyou 1 etc,are bred by Cotton Research Institute,Shanxi Academy of Agricultural Sciences.