随着草食畜牧业的发展，饲草高粱对我国西北地区农业产业结构调整，草食畜牧业发展及生态改良与保护起到了重要作用。为培育适应甘肃不同生态区域种植的优质、高产、抗逆性强的饲用高粱新品种，甘肃省农业科学院作物研究所以高粱A6细胞质类型不育系A6Tx398A为母本、苏丹草楼兰1号与甜高粱MONSTER杂交而获得的优良恢复系F11为父本配制杂交组合，经过多年的南繁北育，选育出饲草高粱新品陇草4号。2021 — 2022年参加甘肃省饲草高粱多点区域试验，2 a 10 点(次)折合平均生物产量103 647.6 kg/hm2，较对照品种陇草1号增产10.6%。2022年参加甘肃省饲草高粱生产试验，折合平均生物产量106 758.5 kg/hm2，较对照品种陇草1号增产6.0%。籽粒含粗蛋白68.0 g/kg、粗灰分76.0 g/kg、木质素43.0 g/kg、中性洗涤纤维559 g/kg、酸性洗涤纤维366 g/kg，干物质283 g/kg，干重百分比中，氢氰酸含量为8.32 mg/kg。该品种具有再生能力强，生长迅速，茎叶鲜嫩等优点，适宜在甘肃省酒泉、金昌、武威、兰州、平凉、庆阳等干旱半干旱生态区地区推广种植。

With the development of herbivorous animal husbandry, forage sorghum has played an important role in adjusting the agricultural industrial structure, developing herbivorous livestock, and improving and protecting the ecology in the northwest region of China. To cultivate high-quality, high-yield, and stress-resistant new varieties of forage sorghum suitable for different ecological regions in Gansu, the Crop Research Institute of the Gansu Academy of Agricultural Sciences used the A6Tx398A cytoplasmic male sterile line as the maternal parent and the excellent restoring line F11, obtained by crossing Sudan grass Loulan 1 with sweet sorghum MONSTER, as the paternal parent to create hybrid combinations. After several years of breeding, the new forage sorghum variety Longcao 4 was developed. From 2021 to 2022, it participated in multiple regional experiment in Gansu Province, yielding an average biological yield of 103,647.6 kg/ha, which was 10.6% higher over the control variety Longcao 1. In 2022, it participated in production experiment, achieving an average biological yield of 106,758.5 kg/ha, a 6.0% increase compared to the control Longcao1. The grain contains 68.0 g/kg crude protein, 76.0 g/kg crude ash, 43.0 g/kg lignin, 559 g/kg neutral detergent fiber, 366 g/kg acid detergent fiber, and 283 g/kg dry matter, with a cyanide content of 8.32 mg/kg. This variety exhibits strong regeneration ability, rapid growth, and tender stems and leaves, making it suitable for promotion and planting in arid and semi-arid ecological areas such as Jiuquan, Jinchang, Wuwei, Lanzhou, Pingliang, and Qingyang in Gansu Province.

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甘肃省农业科学院现代生物育种项目(2023GAAS10)；甘肃省农业科技支撑项目(KJZC-2024-6)； 甘肃省科技厅重点研发计划(23YFNA0003)；国家自然科学基金地区基金项目(32160498)。