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吸草回归深度对玉米产量潜力和温室气体排放的影响

Junqiang Wang¹, Yehui Han¹, Chao Zhou¹

¹Heilongjiang Academy of Agricultural Sciences, Qiqihar, China.

Frontiers in plant science

|March 7, 2024

概括

在15-25厘米深处加入草显著提高了玉米产量和土壤碳,但增加了全球变暖的潜力. 最佳的草深度提高了土壤的健康状况,并减少了温室气体排放强度.

科学领域:

农业科学农业科学
土壤科学土壤科学
环境科学环境科学

背景情况:

吸草结合提供了农业和环境的好处,但最优的结合深度仍未得到充分研究.
现有的研究往往侧重于表面草的应用,忽视了地下结合深度的影响.

研究的目的:

调查不同吸管融入深度 (15厘米,25厘米,40厘米) 对作物产量,土壤有机碳 (SOC),总 (TN) 和温室气体排放的影响.
评估与不同深度吸入草相关的全球变暖潜力 (GWP) 和温室气体排放强度 (GHGI).

主要方法:

确定了四种处理方法:没有吸管回归 (CK),吸管回归15厘米 (S15),25厘米 (S25) 和40厘米 (S40).
在研究期间的测量包括作物产量,SOC,TN,C:N比率,GWP和GHGI.

主要成果:

吸草的加入显著增加了所有深度的SOC,TN和C:N比率.
玉米谷物产量在S15 (4.175.49%) 和S25 (6.6410.06%) 处理后大幅增加,与改善的土壤碳和状况相关.
虽然S15,S25和S40增加了GWP (分别为9.3520.37%,4.277.67%,0.726.14%),但S25在2021年和2022年显著降低了GHGI.

结论:

在15-25厘米深处加入草是提高土壤生产力和碳捕获的有效策略.
虽然吸草的加入可以增加GWP,但S25处理显示出降低温室气体排放强度的潜力,表明其作为理想的土壤改善和施肥方法的价值.

关键词:

温室气体的温室气体是什么玉米玉米玉米是一种土壤有机碳土壤有机碳草返回回回来的草潜在的收益率可能产生潜在收益率.

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