Short-term influence of biochar on soil temperature, liquid moisture content and soybean growth in a seasonal frozen soil area
Short-term influence of biochar on soil temperature, liquid moisture content and soybean growth in a seasonal frozen soil area
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生物炭对季节性冻土区土壤温度、液体含水量及大豆生长的短期影响
DOI：
10.1016/j.jenvman.2020.110609
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发表时间：
2020
影响因子：
8.7
通讯作者：
Ji Yi
中科院分区：
文献类型：
--
作者：
Li Qinglin;Wang Min;Fu Qiang;Li Tianxiao;Liu Dong;Hou Renjie;Li Heng;Cui Song;Ji Yi
近十年来，生物炭在农业土壤中的应用引起了广泛关注。然而，很少有人研究生物炭修饰对植物叶片营养成分和生理过程的影响。为了给作物提供更好的生长环境，探索黑龙江省典型黑壤地区农田土壤环境中生物炭的最佳调控模式，通过田间试验，选择大豆作为试验作物，在土壤中施用生物炭。分阶段监测大豆植株的农艺性状和土壤条件。探讨了不同施药方式和生物炭梯度对作物不同生育期土壤耕层水热变化的影响，比较了作物不同生育期农艺性状的细微差异。结果表明，各种生物炭施用模式都不能改变土壤耕层水热变化受环境因子影响的总体趋势，对20 cm土层土壤液体含水率影响不明显。施用生物炭可以增加株高，减小茎粗，但其效应是非线性的。叶片含氮量(叶片含氮量)和叶片叶绿素相对含量(SPAD)在冠层中呈垂直分布，但随着生物炭施用量和方式的改变变化不显著。秋季施用生物炭可能会使作物提早成熟。在生物炭施用量为9 kg/m−2的情况下，春秋两季混施可带来最佳的生物炭施用效果。
In the past decade, the application of biochar in agricultural soils has attracted wide attention. However, few studies have carefully explored the effects of biochar modification on plant leaf nutrients and the physiological process of plant leaves. To provide a better growing environment for crops and explore the best regulation mode of biochar in the farmland soil environment in the typical black loam area of Heilongjiang Province, through field experiments, we selected soybeans as the test crop and applied biochar in the soil. The agronomic characteristics and soil conditions of soybean plants were monitored by stage. The effects of different application methods and biochar gradients on the water and heat changes in soil tillage layers during different growth stages of crops were discussed, and the subtle differences of agronomic characteristics in different growth stages of crops were compared. The results showed that all kinds of biochar application modes could not change the general trend of water and heat change in soil tillage layer affected by environmental factors, and the effect of biochar application on soil liquid moisture content at 20 cm soil layer was not obvious. Biochar application can increase plant height and reduce stem diameter, but the effect is non-linear. The leaf nitrogen content (Leaf N-content) and leaf chlorophyll relative content (SPAD) were vertically distributed in the canopy, but they did not change significantly with the change of biochar application rate and mode. The application of biochar in autumn may bring crops into maturity earlier. Under the biochar application rate of 9 kg m−2, the mixed application in spring and autumn can bring the best biochar application effect.