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Effects of biochar on saline soil improvement and melon growth

ZHANG Fu-rong;ZHAO Li-na;ZHANG Rui;HUANG Dan-feng;JIANG Hong;CHEN Yun-fei;ZHANG Yi-Dong;School of Agriculture and Biology,Shanghai Jiao Tong University,Key Laboratory of Urban Agriculture(South),Ministry of Agriculture,P.R.China;Tony's Farm;  
In order to explore the effects of biochar on saline soil improvement and crop growth,two melon(Cucumis melo L.) varieties ' Bingxuecui' and ' Yulu' were carried out under saline soil with organic fertilizer treatment and biochar treatment.The results showed that compared with organic fertilizer treatment,biochar treatment could effectively drop soil electrical conductivity from 1 232.8 |xS/cm to 940.0 μS/cm during fruit maturation period of ' Bingxuecui';Soil respiration under biochar treatment was 0.45 g/(m~2? h) in ' Yulu',it was48.28%lower than organic fertilizer treatment in fruit enlargement period;Net photosynthetic rate and stomatal conductance were increased 14.25%and 69.99%in flowering period of ' Bingxuecui'.The results demonstrated that biochar could reduce soil respiration,soluble salt content in soil,greenhouse gas CO_2 emissions and improve the net photosynthetic rate,fruit weight and quality.But it played little role on melon' s biomass and fruit quality.
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