TEMPORAL VARIATIONS IN SOIL CHEMICAL PROPERTIES AND NUTRIENT AVAILABILITY IN RESPONSE TO MAIZE BIOCHAR PRODUCED AT DIFFERENT TEMPERATURES

IF 0.7 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY
M. Naeem
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引用次数: 2

Abstract

Biochar is a carbon-rich material produced through pyrolysis of biological material under controlled conditions. An incubation experiment was carried out in a calcareous soil to determine the temporal effect of maize biochar produced at three different temperatures 300, 400, and 500°C on soil chemical properties and nutrient availability. The variations in potassium (K), phosphorus (P), mineral nitrogen (MN), ammonium-nitrogen (NH4 + -N), nitrate-nitrogen (NO3 − -N), soil organic carbon (SOC), cation exchange capacity (CEC) and pH was evaluated by adding biochar in soil @ 0, 1.0 and 1.5% for incubation period (10, 20, 30, 40 and 50 weeks). Results revealed that soil pH was decreased with biochars (B300 and B400), particularly @ 1%. At the end of incubation, CEC was increased (12%) over control with B300 added @ 1%. The SOC and K contents significantly increased by increasing pyrolysis temperature, biochar rate and incubation time. The highest increase in SOC (51%) and K (367%) was observed with B500 @ 1.5% over control. The N contents (NH4 + , NO3 − ) increased with increasing incubation time; highest NH4 + -N (97%) and NO3 − -N (118%) were observed @ 1.5% B300. Likewise, MN increased (107% over control) @ 1.5% B300. The available P increased in first 30 weeks but after that, it was decreased with increase in time. However, an increase of 65% in P over control was observed @1.5% B300. It is concluded that addition of B300 @ 1.5% improved the soil chemical properties and nutrient availability of the calcareous soil that needs to be verified further in field experiments.
不同温度下玉米生物炭对土壤化学性质和养分有效性的响应
生物炭是一种在受控条件下通过生物材料热解产生的富碳材料。在石灰性土壤中进行了培育实验,以确定在300、400和500°C三种不同温度下生产的玉米生物炭对土壤化学性质和养分有效性的时间影响。通过在0、1.0和1.5%的土壤中添加生物炭,在培养期(10、20、30、40和50周)内评估钾(K)、磷(P)、矿质氮(MN)、铵态氮(NH4+-N)、硝态氮(NO3--N)、土壤有机碳(SOC)、阳离子交换容量(CEC)和pH的变化。结果表明,生物炭(B300和B400)降低了土壤pH值,尤其是在1%时。在培养结束时,CEC比对照增加(12%),添加B300@1%。随着热解温度、生物炭速率和培养时间的增加,SOC和K含量显著增加。观察到SOC(51%)和K(367%)的最高增加,B500@1.5%。氮含量(NH4+、NO3-)随培养时间的增加而增加;在1.5%B300时,NH4+-N(97%)和NO3--N(118%)最高。同样,MN在1.5%B300时增加(比对照增加107%)。有效磷在前30周增加,但在那之后,随着时间的增加而减少。然而,在1.5%B300时,P比对照增加了65%。结果表明,添加B300@1.5%可以改善石灰性土壤的化学性质和养分有效性,这需要在田间试验中进一步验证。
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来源期刊
Pakistan Journal of Agricultural Sciences
Pakistan Journal of Agricultural Sciences AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
1.80
自引率
25.00%
发文量
18
审稿时长
6-12 weeks
期刊介绍: Pakistan Journal of Agricultural Sciences is published in English four times a year. The journal publishes original articles on all aspects of agriculture and allied fields.
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