东北农业大学资源与环境学院,哈尔滨,150030
[ "魏志淼(2000—),男,硕士研究生,主要从事黑土保育与农业废弃物资源化利用研究。E-mail:weizhimiao2000@163.com" ]
纸质出版:2024
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魏志淼, 张少良, 闫思华, 等. 生物炭施用对冻结期退化黑土水热盐动态变化的影响[J]. 水土保持学报, 2024,38(4):322-334.
WEI Zhimiao, ZHANG Shaoliang, YAN Sihua, et al. Effects of Biochar Application on the Dynamic of Soil Moisture-Temperature-Salt in Degraded Mollisols During Freezing Period[J]. 2024, 38(4): 322-334.
魏志淼, 张少良, 闫思华, 等. 生物炭施用对冻结期退化黑土水热盐动态变化的影响[J]. 水土保持学报, 2024,38(4):322-334. DOI: 10.13870/j.cnki.stbcxb.2024.04.025.
WEI Zhimiao, ZHANG Shaoliang, YAN Sihua, et al. Effects of Biochar Application on the Dynamic of Soil Moisture-Temperature-Salt in Degraded Mollisols During Freezing Period[J]. 2024, 38(4): 322-334. DOI: 10.13870/j.cnki.stbcxb.2024.04.025.
[目的] 生物炭施用可改变土壤理化性状
研究不同生物炭施用方式对土壤水、热及电导率(EC)分布的影响
可为季节性冻土科学管理提供依据。[方法] 利用田间定位试验
通过长期观测
研究东北黑土区不同生物炭施用方式对冻结期的土壤液态水含量、温度及EC的影响差异。生物炭施用方式包括一次性生物炭混施40 t/hm2(HO)、生物炭底施40 t/hm2(HE)
空白为0 t/hm2(CK)。[结果] 2种生物炭施用方式均增加冻结期土壤平均液态水含量(p<0.05)
表现为HO>HE>CK;整个试验周期内生物炭施用均显著增加土壤EC
且HO和HE处理土壤平均EC分别比CK增加17.73%
6.89%;2种生物炭施用方式对土壤温度影响不同
与CK相比
HE处理土壤平均温度提高0.32 ℃
而HO处理土壤平均温度降低0.46 ℃。此外
HE处理相较于HO和CK处理减弱冻结期土壤液态水、温度及EC的变化幅度。[结论] 生物炭混施和底施均有利于提高冻结期退化黑土液态水含量和EC
特别是生物炭底施还有利于提升冻结期耕层土壤温度
而生物炭混施在同时期还有利于减缓土壤冻结作用
2种生物炭施用方式均可能对冻结期土壤水盐运移和物质转化过程有重要影响
甚至对春季作物出苗和早期生长产生重要影响。
[Objective] Biochar application can change soil physicochemical properties. The study of the effects of different biochar application methods on soil moisture
temperature and electrical conductivity (EC) distribution
which can provide basis for the scientific management of seasonally frozen soil. [Methods] The effects of different biochar application methods on soil liquid water content
temperature and EC during freezing period were studied by field experiment and long-term observation in black soil region of northeast. Biochar application methods included one-time biochar mixed application of 40 t/hm2(HO)
biochar bottom application of 40 t/hm2 (HE)
and the blank was 0 t/hm2 (CK). [Results] Both biochar application methods increased the mean soil liquid water content during the freezing period (p < 0.05)
as HO > HE > CK. The application of biochar application significantly increased soil EC throughout the experimental cycle
and the average soil EC increased by 17.73% and 6.89% in the HO and HE treatments
respectively
compared to CK. The two biochar application methods had different effects on the soil temperature. Compared with CK
the mean soil temperature increased by 0.32 ℃ in the HE treatment
while the mean soil temperature decreased by 0.46 ℃ in the HO treatment. In addition
the HE treatment weakened the range of change in soil liquid water
temperature and EC during the freezing period compared to HO and CK treatments. [Conclusion] Both heterogeneous and homogeneous biochar application were beneficial to increase the liquid water content and EC of degraded black soil during freezing period. Especially heterogeneous biochar application was also beneficial to increase the soil temperature of the tillage layer during freezing period
homogeneous biochar application can also reduce the soil freezing during freezing effect during the same period. Both of the two biochar application modes may have an important impact on the soil moisture-salt transport and material transformation process during the freezing period
and even have an important effect on the spring emergence and early growth of crops.
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