克拉特基法是一种被动的、非循环的水培技术，植物在没有水泵或电力的情况下，在营养液储液池上方生长。当植物消耗溶液时，网盆下方会形成一个气隙，将氧气直接输送到根部。
关键事实
- No pumps, electricity, or timers required
- Air gap forms naturally as plants drink the nutrient solution
- Lowest cost and simplest setup of any hydroponic method
- Best for leafy greens, herbs, and short-cycle crops
- Reservoir is filled once and topped up as needed — minimal maintenance
- Developed by B.A. Kratky at the University of Hawaii