摘要
通过对普那菊苣Cichorium inlybus物候期、积温需求、生长速度、产草量、再生速度、茎叶比、营养成分动态和养分需求规律进行研究，结果表明：普那菊苣莲座叶丛期最长，为80d以上，抽苔到孕蕾、孕蕾到开花时间较短，只有14d左右，开花到成熟为35d左右；随着播种期的推迟，生育期从157d减少到135d；正常开花结实所需积温为2950℃左右，达不到2200℃则不能正常完成整个生长发育周期；顶峰生长速度为3．01cm／d，平均生长速率为1．35cm／d；平均高度增长与0～30cm土层含水量、降水量累积和≥O℃的积温累积显著相关，并符合柯布一道格拉斯函数：1gY=C＋B1lgX1＋B2lgX2＋B3lgX3；刈割高度以40cm左右为最好；栽培因子对产草量影响大小为密度〉N肥〉K肥〉P肥，产量≥84181．5kg／hm^2的高产栽培技术方案为：密度74790窝／hm^2，N肥168．75kg／hm^2，K2O肥34．5kg／hm^2，P2O5肥232．5kg／hm^2。
The phonological period, requirement of accumulative temperature, growth speed, forage yield,regrowth speed, stem/leaf ratio, nutrients dynamics and nutritional requirements of Cichorium inlybus were studied. The results indicated that： the leafy period of Cichorium inlybus was the longest, over 80 days; from shooting to budding,from budding to flowering, only about 14 days; from flowering to mature was about 35 days; with the delay of sowing, growth and development period decreased from 157 days to 135 days. The accumulative temperature requirement for normal flowering and seeding was about 2 950 ℃, less than 2 200 ℃ the whole growth and development cycle would not complete normally; the peak growth speed was 3.01 cm/d, average growth rate was 1.35 cm/d; increase of average height was significantly correlated with water content in 0-30 cm soil layer, accumulated precipitation and ≥0 ℃ accumulated temperature, and conformed to function： lgY=C＋B1lgX1 ＋ B2lgX2 ＋ B3lgX3 ;cutting height was better to be about 40 cm; the influence of cultivation factors on forage yield was density〉N fertilizer〉K fertilizer〉P fertilizer; plan of high yielding cultivation techniques was： density 74 790 plants/hm^2 , N fertilizer 168. 75 kg/hm^2 , KO2 fertilizer 34. 5 kg/hm^2 ,P2O5 fertilizer 232.5 kg/hm^2.
出处
《草业科学》
CAS
CSCD
2006年第7期23-27,共5页
Pratacultural Science
基金
贵州省农业厅项目资助(黔农科字[2002]02)
关键词
普那菊苣
留茬高度
刈割高度
生长发育规律
Cichorium inlybus
cutting height
growth and development regularity
作者简介
熊先勤（1971-），男，贵州道真人，高级畜牧师，大学，从事草地农业研究。
