| To study the effects of different conservation tillage on the photosynthetic characteristics and yield of jujube, five years old Zizyphus jujube cv. Jun zao was selected as test materials. The results showed as the following: (1) On the whole, SPAD, net photosynthesis rate and transpiration rate of jujube increased in the order of plow tillage＞rotary tillage＞non-tillage, those of jujube straw mulching＞non-mulching＞film mulching. (2) Diurnal variations of photosynthesis rate in fruit setting stage of jujube roughly demonstrated double-apex curves. The net photosynthetic rate of all measures except for NF(no till + covering plastic film) and RS(rotary tillage + straw mulching) were generally slightly higher than the contrast(NB), but the difference was not significant. And the transpiration rate decreased firstly then increased but decreased finally, TS(ploughing + straw mulching) was significantly higher than control (NB) by 3.63%. (3) Conservation tillage measures except for TF(ploughing + covering plastic film) improved jujube production obviously. Comprehensive analysis showed that TS had higher SPAD, net photosynthetic rate, transpiration rate and yield, which can be used for jujube orchard management in the target area. |