能量就是作功的本领。从哲学意义上说,能量是物质运动的表现,物质运动的量度。自然界存在着各种物质运动形式,相应的也存在着各种形式的能量,如机械能、热能、化学能、电磁能、核能等等,如果状态变化只限运动速度的不同,相应能量就是动能,如果状态变化是物体位置的改变,相应能量便是势能(位能),这些都是能量的各种不同形式。能量不能消失,也不能创造,它只能从一种形式转换成另一种形式,所以叫能量守恒和转化定律。最近在农业科学上,如作物 Energy is the ability to work. In a philosophical sense, energy is a manifestation of material movement and a measure of material movement. There are various forms of material movement in nature, correspondingly there are various forms of energy, such as mechanical energy, thermal energy, chemical energy, electromagnetic energy, nuclear energy, etc. If the change of state is limited to different movement speeds, the corresponding energy is kinetic energy, If the change of state is the change of the object’s position, the corresponding energy is the potential energy (potential energy), which are all different forms of energy. Energy can not disappear, can not create, it can only be converted from one form to another form, so called energy conservation and transformation law. Recently in agricultural science, such as crops