摘要
研究了生物炭在盐渍化土壤中的改良作用以及对甜瓜生长的影响。结果表明:与施用有机肥(对照)相比,生物炭处理的土壤电导率显著降低,在果实成熟期,栽培‘冰雪脆'土壤电导率由1 232.8μS/cm降为940.0μS/cm;生物炭处理土壤呼吸作用小于对照,在果实膨大期,栽培‘玉露'土壤呼吸作用比对照降低了48.28%,差异显著;在开花期,‘冰雪脆'净光合速率和气孔导度分别比对照提高了14.25%和69.99%。与施用有机肥相比,生物炭处理降低了土壤中可溶性盐分的含量以及土壤的呼吸作用,减少了温室气体CO_2的排放,同时提高了植株的净光合速率,但对甜瓜生物量及果实品质没有显著改善效果。
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 treat-ment could effectively drop soil electrical conductivity from 1 232.8 μS/cm to 940.0 μS/cm during fruit matura-tion period of ‘Bingxuecui’;Soil respiration under biochar treatment was 0.45 g/（m2·h）in ‘Yulu’,it was 48.28% 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 demonstra-ted that biochar could reduce soil respiration,soluble salt content in soil,greenhouse gas CO2 emissions and im-prove the net photosynthetic rate,fruit weight and quality.But it played little role on melon’s biomass and fruit quality.
出处
《上海农业学报》
CSCD
2015年第1期54-58,共5页
Acta Agriculturae Shanghai
基金
上海市科委(12231205103)
上海市农委[沪农科攻字(2012)第2号]
SJTU-UNSW联合研究与发展基金(13X120020003)
上海市园艺学重点学科培养与建设项目
关键词
生物炭
甜瓜
盐渍化土壤
生长参数
土壤理化性状
Biochar
Melon
Salinity soil
Growth parameter
Soil physical and chemical properties
