南京地区冬闲田播种紫花苜蓿生产性能的品种间差异  

Difference of production performance of alfalfa varieties grown on winter-fallow farmland in Nanjing

作　　者：张艳娟[1] 沈益新[1] 

机构地区：[1]南京农业大学动物科技学院,江苏南京210095

出　　处：《草业科学》2010年第2期93-98,共6页Pratacultural Science

基　　金：国家科技支撑计划(2008BADB3B10);兰州大学农业部草地农业生态系统学重点开放实验室

摘　　要：为了筛选适宜我国南方农区冬闲田种植的高产速生紫花苜蓿Medicago sativa品种，试验在南京冬闲田播种条件下对8个半秋眠和非秋眠型紫花苜蓿品种的产量影响因子与干物质积累特性进行了比较。结果表明：在春季收获两茬的短期栽培利用时，紫花苜蓿干物质产量可达730．26～1460．25g／m^2。植株生长性状中，株高、一级分枝数和干物质生长速率对两茬草干物质产量的贡献率均较大。其中，第1茬草的干物质产量与株高、主茎节数、一级分枝数和干物质生长速率呈显著正相关（P〈0．05），再生草的干物质产量依次与干物质生长速率、单株叶面积、单茎茎粗、一级分枝数、株高、株高生长速度和单茎分枝数呈显著正相关（P〈0．05）。WL-414、WL-525HQ、四季旺和德宝4个品种因在株高、一级分枝数和干物质生长速率方面表现优异，产量较高，在南方农区冬闲田有较大的栽培利用潜力。In order to select high yield and quick growth of alfalfa cultivars used in south China, the yield components and dry matter of 8 weak fall dormancy alfalfa cultivars were studied in a winter-fallow farmland in Nanjing. Dry matter yields of 8 alfalfa cultivars were 730.26-1 460.25 g/m^2 determined by harvesting 2 times in next spring. Plant height,primary shoot number and crop growth rate are ted important factors in dry matter yield. At the first significantly with plant height, internode growth rate. At the plant leaf area, stem second cutting, dry matter number per yield was po diameter, primary shoot number, plan g,dry matter yield was positively correlacaulis, primary shoot number and crop sitively correlated with crop growth rate, t height, growth rate of plant height and branch number. Four cultivars including WL-414, WL-525HQ, Siriver and Derby had high potential that would to be used in south China as higher dry matter yield resulted from more plant height, pri- mary shoot number and crop growth rate.

关 键 词：紫花苜蓿 冬闲田 速生栽培 产量影响因子 干物质积累 

分 类 号：S541.9[农业科学—作物学]