摘要
为探究宁夏雨养区不同播量拉巴豆(Dolichos lablab)与青贮玉米(Zea mays)混播对草地生产性能和牧草品质的影响,本试验采用随机区组设计,以不同播量(0 kg·hm^(-2),22.5 kg·hm^(-2),45.0 kg·hm^(-2),67.5 kg·hm^(-2),90.0 kg·hm^(-2))的拉巴豆与青贮玉米混播,并运用灰色关联度法对各处理进行了综合评价。结果表明,青贮玉米单播的鲜、干草产量分别为82.09 t·hm^(-2)和25.21 t·hm^(-2),显著高于青贮玉米与播量为45.0 kg·hm^(-2),90.0 kg·hm^(-2)拉巴豆混播(P<0.05);不同播量拉巴豆与青贮玉米混播饲草的粗蛋白、粗灰分、中性和酸性洗涤纤维含量较青贮玉米单播均有不同程度的增加。经灰色关联度分析,拉巴豆播种量为22.5 kg·hm^(-2)与青贮玉米混播综合性状排名第一,优于其它混播处理和青贮玉米单播,可作为宁夏雨养区适宜播种量推广。
In order to explore the influence of mixed sowing of Dolichos lablab and silage corn on grass yield and forage quality in the rain-fed area of Ningxia,this study adopted a randomized block design,with different sowing rates of Dolichos lablab(0 kg·hm^(-2),22.5 kg·hm^(-2),45.0 kg·hm^(-2),67.5 kg·hm^(-2),90.0 kg·hm^(-2))and mixed sowing of silage corn,and did comprehensive evaluation using grey correlation method.The results showed that the fresh and hay yields of silage corn were 82.09 t·hm^(-2) and 25.21 t·hm^(-2),respectively,which were significantly higher than those of silage corn with 45.0 kg·hm^(-2) and 90.0 kg·hm^(-2) mixed Dolichos lablab sowing(P<0.05).The content of crude protein,crude ash,neutral and acid detergent fiber in mixed forage of Dolichos lablab and silage corn of different sowing rates increased with different degrees compared with single sowing of silage corn.According to the gray correlation analysis,the comprehensive traits of mixed sowing of 22.5 kg·hm^(-2) Dolichos lablab and silage corn ranked the first,which were superior to other mixed sowing treatments and silage corn single sowing,and could be promoted as a suitable sowing amount in Ningxia rain-fed area.
作者
王斌
董秀
李满有
杨雨琦
兰剑
WANG Bin;DONG Xiu;LI Man-you;YANG Yu-qi;LAN Jian(Agricultural College of Ningxia University,Yinchuan,Ningxia 750021,China)
出处
《草地学报》
CAS
CSCD
北大核心
2021年第4期828-834,共7页
Acta Agrestia Sinica
基金
宁夏高等学校一流学科建设(草学学科)项目(NXYLXK2017A01)资助。
关键词
拉巴豆
青贮玉米
不同播种量
混播
Dolichos lablab
Silage corn
Different sowing rates
Mixed sowing