Soil Moisture and Light Distribution of High Photosynthetic Efficiency Fallow Rotation Corn

Through spring corn field experiment in Siping area，high photosynthetic efficiency fallow rotation corn compared with conventional homogeneous ridges was researched，influence of soil bulk density，maize root dry weight，soil moisture content，corn light transmittance and production was studied.Soil bulk density of high photosynthetic efficiency of 0 ~ 40 cm soil layer was significantly below compared with uniform ridge in the maize jointing stage.Soil bulk density of high photosynthetic efficiency of 0~10 cm and 10~20 cm soil layer was lower compared with uniform ridge by 6.98% and 10.01% in the mature period.Root dry weight of high photosynthetic efficiency in the spinning stage of corn，milk stage and mature stage was 19.04%，19.09% and 18.84%higher than uniform ridge.High photosynthetic efficiency average water content was 2.14% higher than uniform ridge in the corn whole growth period.Transmittance average of middle uniform ridge was lower than high photosynthetic efficiency.Transmittance average of at the bottom of the high photosynthetic efficiency on June 28，July 14 and August 4 was respectively 15.33%，10.67% and 7.00% higher than that of the uniform ridge，difference reached significant level.Yield production of high photosynthetic efficiency is higher than uniform ridge，and the trend was increasing year by year.