甘肃中部地区秋播小黑麦套作式复种甜高粱的效应及品质研究

Studies on multiple intercropping effects and quality of autumn sown triticale and sweet sorghum in central Gansu Province

为探索适宜于甘肃省中部地区的秋播小黑麦复种甜高粱技术,于2017-2018年在甘肃省兰州市开展了以前茬作物秋播小黑麦(甘农2号小黑麦)的种植方式为主区,小黑麦→甜高粱跨年复种方式为副区,甜高粱品种(大奖1000、大奖505)为副副区的3因素裂区试验。试验中测定秋播小黑麦株高、枝条数、草产量及营养指标,甜高粱的株高、叶片数、叶长、叶宽、茎粗、草产量及营养等相关指标,并进行分析。结果表明:甘肃中部地区小黑麦复种甜高粱最佳复种方式为秋季甘农2号小黑麦种植3行留30 cm,翌年夏季空行间套作式复种1行甜高粱大奖1000,小黑麦和甜高粱分别于开花期和抽穗期收获,全年总鲜、干草产量分别可达136.52、38.52 t·hm^(-2)。

This research explored the optimal planting configuration when intercropping autumn sown triticale and sweet sorghum in central Gansu Province.The experiment was conducted in 2017-2018 at Lanzhou,Gansu Province,utilizing a three-factor split-split plot design.Main plots contained Gannong No.2 triticale;Sub-plots contained intercropped triticale and sweet sorghum,and varieties of sweet sorghum(Dajiang 1000 and Dajiang 505)were the sub-sub plot factors.Parameters measured included the number of branches,plant height,forage yield and nutritional quality for the autumn sown triticale;While for sweet sorghum,plant height,number of leaves,leaf length and width,stem diameter,forage yield and nutritional quality were determined and analyzed.It was found that the optimum planting practice for intercropping triticale and sweet sorghum was to sown triticale(variety Gannong No.2)in autumn at 30 cm row spacing with every three row left blank,and to sow the blank row in sweet sorghum(Dajiang 1000)in the summer of the following year.Triticale and sweet sorghum were harvested at flowering and heading stages respectively,and the annual total fresh and hay yields at this site in the central region of Gansu Province were,respectively,up to 136.52 and 38.52 t·ha^(-1).