通过在黑龙港地区主要土壤类型壤质潮土上连续3年的耕作试验,研究在不同耕作条件下农田生态系统的能流特点与能量分配的合理性。结果表明,与传统耕作制度相比,保护性耕作(免耕)能够明显提高小麦—玉米一年两作农田生态系统的能量转化率,能量投产比间的差异显著(P<0.01);不同耕作农田生态系统的熵变和自由能绝对值的差异均无统计学意义,但在一定程度上表明免耕增强了农田生态系统的有序性,从而提高了系统的相对生产力。 Through the three-year cultivation experiment on the loamy soil of the main soil type in Heilongjiang Region, the energy flow characteristics and energy allocation of farmland ecosystem under different tillage conditions were studied. The results showed that compared with the traditional farming system, conservation tillage (no-tillage) significantly increased the energy conversion rate of wheat-maize ecosystem in two crops a year, with significant difference in energy production ratio (P <0.01) There was no significant difference in the absolute values ​​of entropy change and free energy of farmland ecosystem, but to a certain extent, no-tillage increased the orderliness of farmland ecosystem, thus improving the relative productivity of the system.