摘要
针对目前我国苜蓿种植缺乏合理的规划和布局、盲目引种等问题,于2006年初对全国苜蓿种植县开展了的问卷调查,对目前苜蓿资源情况进行了全面了解,并利用地理信息系统（GIS）对其空间分布和生产力状况进行了详细分析。研究表明,截止到2005年全国16个省区的614个苜蓿分布旗县的苜蓿累计保留面积达254.77万hm2,占全国人工草地面积的50.8%;并按照面积数据分布情况将其划分为5级（小于333hm^2、333～3333hm^2、3333～10000hm^2、10000～33333hm^2、33333～74313hm^2）,各级分别占苜蓿总面积的0.83%、14.49%、28.84%、42.45%、13.62%;苜蓿平均干草单产为10150kg/hm^2,占总面积的46%;根据数据分布情况将干草产量数据划分为5级（小于3000kg/hm^2、3000～7500kg/hm^2、7500～12000kg/hm^2、12000～18000kg/hm^2、18000～31005kg/hm^2）,各级分别占总面积的14.32%、21.31%、46.75%、14.86%、0.83%;全国苜蓿种子田面积17.29万hm^2,种子平均单产为325.13kg/hm^2。
According to the requirements for alfalfa planting, an integrated national questionnaire on alfalfa planting in county level was carried out in 2006, which covered planting area, productivity, seed production and its utilization in 614 counties of 16 alfalfa planting provinces. The Geography Information System（GIS） has been applied for analyzing alfalfa special distribution and productivity. The results showed that the total accumulative planting area of alfalfa was 2.55 million hm^2 , about 50.8% of total pasture area; and alfalfa planting area was classified into 5 levels： 〈 333hm^2, 333 - 3333hm^2, 3333 - 10000hm^2, 10000 33333hm^2 and 33333-74313hm^2,which was 0. 83%, 14.49%, 28.84%,42.45%,13.62% of total area respectively; average hay yield was 10150kg/hm^2 ,about 46 % of total planting area;and the productivity was classified into 5 levels.〈3000kg/hm^2 , 3000-7500kg/hm^2 , 7500-12000 kg/hm^2 ,12000-18000kg/hm^2 , 18000-31005kg/hm^2 , which was 14. 32 %, 21.31 %, 46.75 %, 14. 86%,0. 83% of total area respectively; seed planting area was 0. 17 million hm^2 ,average productivity was 325.13 kg/ hm^2.
出处
《中国草地学报》
CSCD
2007年第4期15-20,共6页
Chinese Journal of Grassland
基金
农业部"中国苜蓿资源评价和综合开发利用研究"课题
"863"计划课题"草原监测管理系统关键研究"(2006AA10Z242)
关键词
苜蓿
GIS
资源分布
生产力
Alfalfa
GIS
Resources distribution
Productivity
