摘要
为探讨黄土高原雨养农业区以青贮为目的的光敏型高丹草春播高产栽培方式,于2014~2015连续两年以光敏型高丹草大卡和海牛为试验材料,采用全膜双垄沟(FFDRF)、全膜平铺(FFP)、半膜平铺(HF)和露地(NM)四种栽培方式进行种植,观察并比较了其生长发育指标和产草量的异同。结果表明:覆膜明显缩短了两个品种的生育期;相对露地处理,除茎粗较稳定外,覆膜处理对其他各农艺性状均影响显著(P<0.05)。两个品种连续两年平均干物质产量以FFDRF处理最高,平均达32.73t/hm2,较FFP、HF和NM分别增产2.14%、27.88%和59.50%,FFP较HF和NM分别增产25.20%和56.16%,HF较NM增产24.73%;两年大卡的干物质产量均高于海牛,平均增产13.52%。综上所述,在黄土高原雨养农业区,以青贮为利用目的时,选择品种大卡以全膜双垄沟或全膜平铺种植方式为最优春播生产模式。
Two photoperiod-sensitive sorghum-Sudan hybrids,Big Kahuna and Monster,were planted in spring by 4 cultivation methods：plastic-film fully mulching on the double ridges and furrows（FFDRF）,plastic-film fully mulching on the plain soil（FFP）,plastic-film half mulching on the plain soil（HF）and open field or no mulching（NM）,in 2014 and 2015.The agronomic traits and grass yield were observed and compared.The results showed that the growing periods were shortened significantly at 0.05 level by the mulching cultivations.Compared with no mulching,all the agronomic traits were significantly affected by mulching except stem diameter which was always stable.The average dry matter yields of two cultivars with fully mulching on the double ridges and furrows（FFDRF）in two years reached 32.73 t/hm^2,which increased by 2.14%,27.88%and 59.50%compared with plastic-film fully mulching（FFP）and plastic-film half mulching on the plain soil（HF）and no mulching（NM）,respectively.Compared with HF and NM,the dry yield of FFP increased by 25.20% and 56.16% respectively,while HF was higher than NM by24.73%.Over two years,the fresh grass yield and dry matter yield of Big Kaduna were higher than Monster.The average dry matter yield increased by 13.52%.In conclusion,the optimum cultivation method for PPS sorghum-sudan hybrid sowing in spring for silage in rain-fed farming region of Loess Plateau was Big Kaduna cultivated by FFDRF or FFP.
作者
何振富
蓝祖庆
贺春贵
王国栋
刘陇生
葛玉彬
HE Zhen-fu;LAN Zu-qing;HE Chun-gui;WANG Guo-dong;LIU Long-sheng;Ge Yu-bin(Animal Husbandry-Pasture and Green Agriculture Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China;Hainan College of Economics and Business, Haikou 571127, China;Gansu Academy of Agricultural Sciences, Lanzhou 730070, China;Crops Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China)
出处
《中国草地学报》
CSCD
北大核心
2018年第2期116-120,共5页
Chinese Journal of Grassland
基金
甘肃省科技厅科技重大专项"饲用甜高粱种质创新及栽培饲用技术研究与示范"(1502NKDA005)
甘肃省科技厅科技支撑项目"高粱草旱作高效种植利用技术研究与示范"(144NKCA055)资助
关键词
黄土高原雨养农业区
栽培方式
光敏型高丹草
生长发育
草产量
Rain-fed farming region in Loess Plateau
Cultivation methods
Photoperiod-sensitive Sor-ghum-Sudan Hybrid
Growth and development
Yield
