【摘要】 基于棉田膜下滴灌技术的管网设施,开展了随水滴施高水溶性碳素肥料,以提高棉田冠层CO2浓度及其效应研究。通过设置不同的碳氮施肥组合处理,对棉花冠层CO2浓度、光合速率及产量构成等进行测定分析。结果表明:随水滴施高水溶性碳素肥料(水不溶物<1%)能有效提高棉田冠层CO2浓度;在不同的碳氮施肥处理中,盛花期冠层CO2浓度随碳肥用量增加呈升高趋势。在水分充足、氮肥亏缺条件下,C300+N113.55处理的棉株光合速率相对较高,C600+N0处理光合速率最低;在籽棉产量方面,C300+N113.55处理最高,C600+N0处理最低,且产量差异达到显著水平。更多还原

【Abstract】 Based on pipe network system of drip irrigation under plastic film,the possibility of increasing cotton field canopy CO2 concentration and its effect were investigated via fertilization of dissolvable carbon fertilizer(water insoluble matter <1%).By setting different carbon and nitrogen fertilizer combination treatments,canopy CO2 concentration,leaf photosynthetic rate and yield formation of cotton field in Xinjiang were analyzed.The results show that canopy CO2 concentration was increased with the amount of carbon fertilizer increasing in cotton florescence.Under the conditions of providing adequate irrigation water and inadequate N fertilization,the leaf photosynthetic rate was higher under C300+N113.55 treatment(C300 means that the amount of ammonium bicarbonate was 300 kg/hm2),and N113.55 means that the amount of nitrogen was 113.55 kg/hm2,and it was the lowest under C600+N0 treatment.The seed cotton yield under C300+N113.55 treatment was the highest,and it was the lowest under C600+N0 treatment.There was a significant difference in seed cotton yield among different carbon and nitrogen fertilizer combination treatments.更多还原