紫花苜蓿是多年生豆科牧草作物，在黄土高原半湿润区大面积栽培。
Alfalfa (Medicago sativa L.) is a perennial legume grass which was cultivated widely on semi-humid areas of the loess plateau.
这为今后龙蒿的育种研究和制种提供了理论依据，也为大面积栽培提供了指导。
Artemisia dracunculus this for the future of research and seed breeding provides a theoretical basis, as well as the cultivation area to provide guidance.
对近几年淮北小麦生产现状的分析表明，小麦品种使用不当、不良气候、土壤肥力偏低以及栽培粗放是当前淮北小麦大面积生产存在的主要问题。
In Huaibei area the unsuitable application of wheat variety, bad climate soil conditions, lower fertility and extensive cultivation were major limiting factors for high wheat yield in large areas.
应用推荐