摘要：
沙化土地是我国的重要土地资源.对GPIT那氏大穗玉米在沙化土地的种植进行试验,结果表明,GPIT那氏大穗玉米单株鲜根质量、干根质量、根密度分别比对照高59.59,39.66 g,0.50 mg/cm3;全株叶面积、穗3叶叶面积、鲜叶质量、干叶质量分别比对照高209.71,335.50 cm,25.98,6.68 g.其强大的根系和繁茂的茎叶,对防风固沙、改善生态环境会起到明显的作用.与此同时,GPIT那氏大穗玉米高光效的特性,又会使茎叶青贮饲料的单位面积产量比对照提高45.88％,籽粒产量比对照提高37.54％;品质也得到明显的改善,茎秆可溶性糖含量比对照提高7.86百分点,籽粒粗蛋白含量提高0.48百分点、淀粉含量提高2.55百分点、可溶性糖含量提高0.10百分点.GPIT那氏大穗玉米在沙化地区的推广应用,对于沙化地区畜牧业的发展,减轻草场因过载引发的自然退化,以及当地人民的脱贫致富和国民经济的发展具有重要意义.%Desertification land is an important land resource in China.The experiment was conducted on the cultivation of GPIT big ear corn in desertification land.The result showed that the per fresh root quality,dry root quality and root density of GPIT big ear corn were higher than the control 59.59 g,39.66 g,0.50 mg/cm3,its whole plant leaf area,ear 3 foliage area,quality of fresh leaf and dry leaf were higher than the control 209.71 cm,209.71 cm,25.98 g and 6.68 g.Its stronger roots and lush stems and leaves could produce obvious effect for windbreak,sand stabilization and improvement of the ecological environment.At the same time,the characteristics of high efficiency effect of CPIT big ear corn would increase the yield per unit area of the silage of the stalk leaves by 45.88％.The yield of seeds was significantly increased by 37.54％.The content of the soluble sugar in the stem was increased by 7.86 percentage points than that of the control group.The crude protein content of seeds increased by 0.48 percentage point,starch content increased by 2.55 percentage points,and the soluble sugar content increased by 0.10 percentage points.The planting of GPIT big ear corn in desertification land will contribute to weaken the natural degeneration of the overloaded grassland,promote the development of animal husbandry in desertification area,help local people overcome poverty and achieve prosperity,and promote the development of national economy.
