长期施肥对春玉米田土壤呼吸及碳平衡的影响研究
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CHENG Wan ̄li1ꎬ LEI Kang ̄ning2ꎬ WANG Shu ̄ying1ꎬ LI Li ̄li3ꎬ FAN Ting ̄lu1ꎬ LI Shang ̄zhong1ꎬ ZHAO Gang1ꎬ ZHANG Jian ̄jun1ꎬ TANG Xiao ̄ming1ꎬ DANG Yi1ꎬ WANG Lei1
摘 要:为探讨不同施肥方式下农田碳平衡规律ꎬ研究农田排放到大气 CO2 的“ 源” 、“ 汇” 特征ꎬ依托 39 a 肥料定 位试验测定了秸秆和氮磷肥配施( SNP) 、农家肥和氮磷肥配施( MNP) 、单施农家肥( M) 、氮磷肥配施( NP) 、单施氮 肥( N) 和不施肥( CK) 等 6 种不同施肥方式下西北黄土旱塬春玉米拔节期到成熟期的土壤呼吸ꎮ 结果表明:长期不 同施肥方式能够影响春玉米农田土壤 CO2 排放ꎬ不同生育时期排放特征不同ꎬ呈先升高后下降趋势ꎬ即开花期达到 排放高峰ꎬSNP、MNP 和 M 的 CO2 排放通量分别达到 3 650.54、2 980.50 mg������m-2 ������h-1 和 2 167.61 mg������m-2 ������h-1 ꎬ与 CK 相比ꎬ分别增加了 340.32%、259.51%和 161.45%ꎮ 不同施肥处理间表现为 SNP >MNP >M>NP >N>CKꎮ 整个测定 时期内土壤 CO2 平均排放速率表现为 SNP>MNP>M>NP>N>CKꎬ土壤呼吸中根系呼吸的贡献率波动在 31% ~ 77%之 间ꎮ 6 种不同施肥处理农田土壤均表现为大气 CO2 排放的“ 汇” ꎬ不同施肥处理农田碳汇强弱不同ꎬ表现为 SNP >M> MNP >NP >N>CKꎮ
(1. Dryland Agriculture Instituteꎬ Gansu Academy of Agricultural Sciences / Key Laboratory of Efficient Water Utilization in Dryland Farming of Gansu Provinceꎬ Lanzhouꎬ Gansu 730070ꎬ Chinaꎻ
Abstract: A field experiment was carried out to explore fertilization effects on soil CO2 emissionꎬ relative con ̄ tribution of root and soil respiration and carbon balanceꎬ and carbon respiration intensity during the period of spring corn jointing to maturity. The effects of different fertilizer applications: straw and chemical fertilizer ( SNP ) ꎬ manure and chemical fertilizer ( MNP) ꎬ single manure ( M) ꎬ nitrogen and phosphorus fertilizer ( NP) ꎬ single ni ̄ trogen fertilizer( N) ꎬ and no fertilizer ( CK) on soil respiration were analyzed based on long ̄term fertilization exper ̄ iment of 39 years. The results showed that soil CO2 emission was significantly affected by different fertilization tech ̄ niques. It showed a considerable fluctuation with the growth stagesꎬ which was in hoisting until reached the peak in anthesis and dropping during the following period. The CO2 emission of SNPꎬ MNP and N was 3 650.54ꎬ 2 980.50 mg������m-2 ������ h-1 and 2 167. 61 mg ������ m-2 ������ h-1ꎬ respectively. Compared with CKꎬ the increases were 340. 32%ꎬ 259.51% and 161.45% for SNPꎬ MNP and Nꎬ respectively. The order of average soil CO2 emission rates were SNP
长期施肥对春玉米田土壤呼吸及碳平衡的影响研究
程万莉1ꎬ雷康宁2ꎬ王淑英1ꎬ李利利3ꎬ樊廷录1ꎬ李尚中1ꎬ 赵 刚1ꎬ张建军1ꎬ唐小明1ꎬ党 翼1ꎬ王 磊1
(1.甘肃省农业科学院旱地农业研究所 / 甘肃省旱作区水资源高效利用重点实验室ꎬ甘肃 兰州 730070ꎻ 2.甘肃农业大学农学院ꎬ甘肃 兰州 730070ꎻ3.平凉市农业科学院ꎬ甘肃 平凉 744500)
第 37 卷第 2 期 2019 年 3 月
干旱地区农业研究 Agricultural Research in the Arid Areas
Vol.37 No.2 Mar. 2019
文章编号:1000 ̄7601(2019)02 ̄0108 ̄06
doi:10.7606 / j.issn.1000 ̄7601.2019.02.16
关键词:春玉米ꎻ施肥方式ꎻCO2 排放ꎻ碳平衡ꎻ长期定ห้องสมุดไป่ตู้试验 中图分类号:S147.21+ 1ꎻS513 文献标志码:A
Effects of long ̄term fertilization on soil respiration and carbon balance in spring corn fields
2. College of Agronomyꎬ Gansu Agricultural Universityꎬ Lanzhouꎬ Gansu 730070ꎬ Chinaꎻ 3.Pingliang Academy of Agricultural Sciencesꎬ Pingliangꎬ Gansu 744500ꎬ China)