关键词: 四倍体刺槐, 四倍体刺槐, 微体快繁, 嫩梢增殖, 生根培养。

Abstract: 果园生草与覆草 摘要 本文主要介绍果园生草与覆草，它是一项新型的果园增产的好技术。果园生草即在果园行间或全园种植对果树有益的特定品种的草。果园覆草是果园土壤管理的一种很好的方法，可采用生草刈割覆盖也可采用作物秸秆、锯沫、谷壳等覆盖。果园生草与覆草可以改良培肥土壤，协调养分供应；改善土壤微生物活动；抑制土壤蒸发，改善农田水文状况；调节土壤温度；改善土壤理化性状。土壤的改进有机肥的增加对果树的生长发育起到至关重要的作用。 Growing grass and coving grass in the orchard is a new way to increase the output of an orchard . Growing grass in the orchard is to plant useful grasseof special kinds in rows or in the whole orchard . Growing grass in the orchard is rather good for the land .People can use green grass or the dead bodies of corns ,sawdust ,or cereal crusts to cover the land .Doing it can enrich the soil,harmonize the supply of nuteiment,improve the land for microorganism to live, protect water from evaporating and change the land temperature.So the improvement of the land and the increasing of organic fertilizer will play an important role in the growing of t fruit trees.