酒泉市不同茬口对甜高粱农艺性状及产量的影响

为了探索甜高粱的种植茬口，通过大田小区试验研究了不同茬口对甜高粱农艺性状、产量、茎秆糖锤度以及对土壤容重的影响。结果表明：绿肥茬口均能不同程度的提高甜高粱的株高、分蘖数等性状，三种绿肥茬口下甜高粱的秆糖锤度为13.97%～14.51%，叶鲜产量为6 862.2～7 199.7 kg/667 m²，其中箭舌豌豆茬产量最高为7 199.7 kg/667 m²，较小麦茬增产4.7%，绿肥翻压还田后均能降低土壤容重，提高土壤孔隙度。

Effects of Different Stubbles on Agronomic Characters and Yield of Sweet Sorghum in Jiuquan

In order to explore the planting stubbles of sweet sorghum, the effects of different stubble on agronomic characters, yield, stem brix and soil bulk density of sweet sorghum were studied through field plot experiment. The results showed that the green manure stubble could improve the plant height and tiller number of sweet sorghum to varying degrees. Under the three green manure stubble, the sugar brix of sweet sorghum was 13.97% ~ 14.51%, and the fresh leaf yield was 6 862.2 ~ 7 199.7 kg/667 m². Among them, the yield of common vetch stubble was the highest, which was 7 199.7 kg/667 m², and the yield was increased by 4.7% compared with wheat stubble . After green manure was turned and returned to the field, the soil bulk density could be reduced, the soil porosity was improved.