1. 东北农业大学资源与环境学院,哈尔滨,150030
2. 中国科学院东北地理与农业生态研究所,哈尔滨,150081
[ "张兴义(1966-),男,博士,研究员,主要从事黑土生态研究。E-mail:zhangxy@iga.ac.cn" ]
网络首发:2022-05-27,
纸质出版:2022
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张兴义, 李健宇, 郭孟洁, 等. 连续14年黑土坡耕地秸秆覆盖免耕水土保持效应[J]. 水土保持学报, 2022,36(3):44-50.
ZHANG Xingyi, LI Jianyu, GUO Mengjie, et al. Effects of Straw Mulching and No Tillage for Continuous 14 Years on Soil and Water Conservation in Mollisols Sloping Farmland[J]. 2022, 36(3): 44-50.
张兴义, 李健宇, 郭孟洁, 等. 连续14年黑土坡耕地秸秆覆盖免耕水土保持效应[J]. 水土保持学报, 2022,36(3):44-50. DOI: 10.13870/j.cnki.stbcxb.2022.03.007.
ZHANG Xingyi, LI Jianyu, GUO Mengjie, et al. Effects of Straw Mulching and No Tillage for Continuous 14 Years on Soil and Water Conservation in Mollisols Sloping Farmland[J]. 2022, 36(3): 44-50. DOI: 10.13870/j.cnki.stbcxb.2022.03.007.
为探究长期秸秆覆盖免耕对黑土坡耕地土壤结构的影响以及水土保持效应
通过秸秆覆盖免耕(NT)和传统顺坡耕作(CT)2组长期定位田间试验
对土壤结构、土壤保水能力、保土效应作对比分析。结果表明:NT与CT相应性状比较
土壤容重没有显著增加(P>0.05)
在0—20 cm土层
虽总孔隙度和非毛管孔隙度低
但增加了土壤毛管孔隙度和水稳性大团聚体(WR0.25)含量
WR0.25含量和平均重量直径(MWD)差异均达到显著水平(P<0.05);分别提高了垄台土壤初始入渗和稳定入渗速率28.8%
24.7%;0—10 cm土层
饱和含水量和田间持水量差异均达到显著水平(P<0.05);减少了产流次数、径流量和土壤流失量分别为11次
86.6%和98.9%
有效地遏制了水土流失。研究结果表明
长期连续秸秆覆盖免耕是一项有利于土壤结构稳定和遏制土壤侵蚀的黑土地保护措施。
To reveal the influence of long-term straw mulching and no tillage (NT) on soil structure and soil and water conservation of Mollisols sloping farmland
two 14 years long-term experiments
including NT and conventional tillage (CT)
were conducted to compare soil structure
water conservation capacity and soil retention effect. The results showed that compared with CT
the soil bulk density of NT did not increased significantly (P>0.05). The total porosity and non-capillary porosity of NT were lower than those of CT in 0-20 cm layer
while NT increased the capillary porosity and content of water stable aggregate (WR0.25)
and the differences in WR0.25 and mean weight diameter of soil aggregate (MWD) between the two treatments were significant (P<0.05). Meanwhile
NT increased the initial infiltration rate and stable infiltration rate of ridge platform by 28.8% and 24.7%
respectively. And in 0-10 cm layer
the differences in saturated water content and field capacity between the two treatments were significant (P<0.05). In addition
the number of runoff production
runoff and soil loss decreased by 11 times
86.6% and 98.9% in NT
respectively. This study indicated that long-term continuous NT was an effective practice to stabilize soil structure and prevent soil erosion in Molliosls.
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