生物炭对东北黑土理化性质影响研究

为探明生物炭对我国黑土理化性质的影响,本研究通过大田试验,设置了设计5个处理,1个空白对照,每个处理0.06 hm2,共3个重复,分别为600 kg/hm2,1200 kg/hm2,1800 kg/hm2,2400 kg/hm2,3000 kg/hm2其依次定为T1、T2、T3、T4、T5,空白对照为CK。研究表明：在土壤物理性状方面,生物炭能够提高土壤空隙度、电导率以及持水量,同时降低土壤容重；在化学养分方面,生物炭能够有效提高土壤有机碳、破解氮、有效磷、有效钾的含量；在供试作物方面,生物炭能够有效提高根系活力以及总根尖数。总之,改善土壤物理结构以及其他物理性状,同时提高土壤养分含量,促进作物根系活力以及根尖数的提高,但对于生物炭对不同土壤作用的特点、施用量以及作用程度还有待进一步研究。

Influence of Biochar on the Physicochemical Properties of Black Soil in Northeast China

To explore the influence of biochar on the physicochemical properties of black soil in northeast China, a field experiment with five treatments was set up as 600, 1200, 1800, 2400 and 3000 kg/hm2 and CK. The results showed that biochar could increase soil porosity, electrical conductivity and water holding capacity while reduce soil bulk density in terms of soil physical properties. In terms of chemical nutrients, biochar could effectively increase soil organic carbon, available nitrogen, available phosphorus, and available potassium. Biochar could effectively increase the root activity and the total number of apical roots. In short, biochar could improve the physical structure of soil and other physical properties, increase the soil nutrient content, and raise root vigor and the number of root tips. However, the characteristics of biochar effect on different soils, the application amount and the effect degree need further study.