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生态学杂志 ›› 2025, Vol. 44 ›› Issue (3): 903-911.doi: 10.13292/j.1000-4890.202503.003

• 研究报告 • 上一篇    下一篇

不同耕作和秸秆还田方式对灰钙土土壤理化性状、酶活性及玉米产量的影响

温美娟,杨思存*,王成宝,霍琳   

  1. (甘肃省农业科学院土壤肥料与节水农业研究所/国家农业科学白银观测实验站/国家盐碱地综合利用技术创新中心白银试验站, 兰州 730070)

  • 出版日期:2025-03-10 发布日期:2025-06-10

Effects of different tillage and straw returning on soil physicochemical properties, enzyme activities in sierozem, and maize yield.

WEN Meijuan, YANG Sicun*, WANG Chengbao, HUO Lin   

  1. (Institute of Soil Fertilizer and Water-saving Agriculture, Gansu Academy of Agricultural Sciences/Baiyin National Scientific Observing and Experimental Station of Agriculture/Baiyin Experimental Station of National Technological Innovation Center for Comprehensive Utilization of Saline-alkali Land, Lanzhou 730070, China).

  • Online:2025-03-10 Published:2025-06-10

摘要: 于2017—2021年在甘肃引黄灌区灰钙土上进行田间试验,设置旋耕(RT)、旋耕秸秆还田(RTS)、深松(ST)、深松秸秆还田(STS)四种耕作和秸秆还田方式处理,研究其对0~40 cm土层土壤理化学性状、土壤胞外酶活性及玉米产量的影响。结果表明:2017—2021年,ST和STS处理显著提高了玉米产量,其中STS处理产量最高,其次为ST处理,二者显著高于RT和RTS;相对于RT、RTS处理,ST和STS可显著降低20~40 cm土层土壤容重(BD)和紧实度,以及0~40 cm土层pH和电导率(EC),且STS降低最显著;STS显著提高了0~40 cm土壤含水量(SWC)、土壤有机碳(SOC)、全氮(TN)、碱解氮(AHN)和有效磷(AP);0~20 cm土层,土壤微生物量均以RTS、ST和STS较高,其中STS微生物量碳(MBC)和微生物量氮(MBN)最高,且STS和RTS显著提高了土壤微生物墒,20~40 cm土层,相对于RT处理,STS显著提高了MBC和MBN,RTS显著提高了MBN;0~20 cm土层,相对于RT处理,ST、RTS和STS均显著提高了β-1,4-葡萄糖苷酶(BG)和纤维二糖水解酶(CBH)活性,且STS显著提高了β-1,4-木糖苷酶(BXYL)活性、β-1,4-N-乙酰基氨基葡萄糖苷酶(NAG)活性和碱性磷酸酶(AKP)活性,而RTS显著提高了NAG活性,20~40 cm土层,相对于RT处理,STS显著提高了BG、BXYL、CBH、NAG、AKP活性,RTS显著提高了BG活性,ST显著提高BXYL活性;相关分析显示,0~40 cm土层MBC、MBN、SOC、TN、AHN、AP、SWC、BD、EC与各类胞外酶活性存在显著或极显著相关性;冗余分析表明,MBC和SOC是影响土壤酶活性的主要环境因子,其次为MBN和pH。综上所述,深松秸秆还田是改善灰钙土土壤物理性状、增加土壤肥力、提高土壤微生物量和酶活性、促进玉米增产的最优耕作措施。


关键词: 深松, 秸秆还田, 土壤微生物量, 土壤酶活性, 土壤理化性状

Abstract: A field experiment with four treatments was conducted in sierozem of the Gansu Yellow River irrigation area in 2017-2021, including conventional rotary tillage (RT), rotary tillage with maize straw returning (RTS), subsoil tillage (ST), subsoil tillage with maize straw returning (STS). After harvesting maize in 2017-2021, topsoil (0-20 cm) and subsoil (20-40 cm) samples were collected. Soil physicochemical properties, soil microbial biomass carbon and nitrogen, soil extracellular enzyme activities involved in soil carbon, nitrogen, and phosphorus cycling, and maize yield were measured. The results showed that compared with RT and RTS, ST and STS significantly increased maize yields, with the highest yields in STS. ST and STS significantly reduced soil bulk density and soil compaction of 20-40 cm soil layer, pH and EC of 0-40 cm soil layer, with the lowest in STS. Compared with RT, STS significantly increased SWC, SOC, TN, AHN, and AP in 0-40 cm soil layer. RTS, ST and STS significantly increased MBC and MBN in 0-20 cm soil layer, with the highest in STS. STS and RTS significantly increased MBC/SOC. In 20-40 cm soil layer, STS significantly increased MBC and MBN, and RTS significantly increased MBN. In 0-20 cm soil layer, ST, RTS and STS significantly increased the activity of BG and CBH, and STS significantly increased the activity of BXYL, NAG and AKP, while RTS significantly increased the activity of NAG. In 20-40 cm soil layer, STS increased the activity of BG, BXYL, CBH, NAG and AKP, RTS increased the activity of BG, and ST increased the activity of BXYL. Correlation analysis showed that, in 0-40 cm soil layer, MBC, MBN, SOC, TN, AHN, AP, SWC, BD, and EC showed significant or extremely significant correlation with the activities of various extracellular enzymes. Redundancy analysis showed that MBC and SOC were the main factors affecting soil enzyme activities, followed by MBN and pH. In conclusion, subsoil tillage with straw returning is the best tillage mode to improve soil physical properties, increase soil fertility, soil microbial biomass and enzyme activity, and thus enhance corn yield.


Key words: subsoil tillage, straw returning, soil microbial biomass, soil enzyme activity, soil physicochemical property