中国农业科技导报 ›› 2023, Vol. 25 ›› Issue (2): 152-162.DOI: 10.13304/j.nykjdb.2021.0996
• 生物制造 资源生态 • 上一篇
收稿日期:
2021-11-23
接受日期:
2022-01-18
出版日期:
2023-02-15
发布日期:
2023-05-17
通讯作者:
孙树臣
作者简介:
郑云珠 E-mail:yunzhuzheng@163.com;
基金资助:
Received:
2021-11-23
Accepted:
2022-01-18
Online:
2023-02-15
Published:
2023-05-17
Contact:
Shuchen SUN
摘要:
为探讨生物炭和秸秆在石灰性潮土区对麦玉轮作系统的影响,采用冬小麦季玉米秸秆还田-夏玉米季小麦秸秆不还田的单季还田模式,按照观测小区内实际平均玉米秸秆干物质量进行倍数施用,设置玉米秸秆0.5(S0.5)、1.0(S1.0)、1.5(S1.5)和2.0倍(S2.0)还田,以及将等量玉米秸秆全部转化为生物炭进行施用(B0.5、B1.0、B1.5、B2.0),以无生物炭和秸秆的处理为对照(CK),测定不同处理下的土壤养分及作物产量。结果表明,生物炭和秸秆还田处理对冬小麦、夏玉米两季的土壤全效以及速效养分具有一定的促进作用,整体上在冬小麦季对土壤养分的改善及碳氮比的提升效果优于夏玉米季。在冬小麦季,生物炭和秸秆还田处理的小麦籽粒产量较对照分别显著增加9.04%~21.76%和15.31%~22.96%;在夏玉米季,B0.5、S1.0、S1.5、S2.0处理的玉米籽粒产量较对照分别显著增产10.86%、8.72%、10.89%、12.22%。整体上施用生物炭和秸秆对冬小麦的增产效果高于夏玉米,且以秸秆还田处理的增产效果更优。因此,在鲁西平原石灰性潮土区正常施肥的基础上,在冬小麦季施加0.5倍玉米秸秆炭化的生物炭或1.0倍玉米秸秆不仅有利于提高土壤肥力,还可以增加冬小麦、夏玉米两季作物的籽粒产量。
中图分类号:
郑云珠, 孙树臣. 秸秆生物炭和秸秆对麦玉轮作系统土壤养分及作物产量的影响[J]. 中国农业科技导报, 2023, 25(2): 152-162.
Yunzhu ZHENG, Shuchen SUN. Effects of Straw Biochar and Straw on Soil Nutrients and Crop Yield in Wheat-Maize Rotation System[J]. Journal of Agricultural Science and Technology, 2023, 25(2): 152-162.
指标 Index | 土层 Soil layer/cm | CK | B0.5 | B1.0 | B1.5 | B2.0 | S0.5 | S1.0 | S1.5 | S2.0 |
---|---|---|---|---|---|---|---|---|---|---|
全氮 Total nitrogen | 0—20 | 2 168.92± 104.89 ab | 2 307.50± 85.06 ab | 2 240.78± 98.02 ab | 2 162.40± 22.62 ab | 2 336.88± 175.87 ab | 2 088.75± 141.74 b | 2 354.15± 125.05 a | 2 374.88± 71.08 a | 2 411.18± 259.52 a |
0—100 | 8 521.53± 643.67 a | 8 388.45± 385.08 a | 8 489.34± 365.32 a | 8 767.60± 409.74 a | 8 527.24± 461.42 a | 8 621.05± 541.79 a | 8 691.36± 717.75 a | 8 667.83± 455.71 a | 9 382.16± 896.55 a | |
全磷 Total phosphorus | 0—20 | 2 080.23± 127.10 a | 2 217.71± 14.57 a | 2 186.92± 162.75 a | 2 091.40± 20.89 a | 2 221.95± 103.42 a | 2 083.45± 91.77 a | 2 136.95± 79.81 a | 2 087.65± 41.15 a | 2 267.58± 370.27 a |
0—100 | 8 901.13± 367.37 a | 8 964.10± 207.84 a | 8 809.04± 325.36 a | 8 752.81± 245.98 a | 8 792.37± 47.35 a | 8 850.00± 483.89 a | 8 951.65± 251.07 a | 8 963.81± 35.14 a | 9 473.29± 785.11 a | |
全钾 Total potassium | 0—20 | 49 517.63± 431.16 a | 50 192.91± 989.94 a | 50 444.92± 1 023.15 a | 50 525.82± 1 433.89 a | 49 837.27± 3 364.12 a | 50 544.25± 69.68 a | 51 230.22± 1 950.48 a | 51 487.85± 2 374.28 a | 50 620.47± 729.05 a |
0—100 | 254 045.00± 4 553.47 a | 256 166.48± 2 126.81 a | 258 129.48± 2 192.89 a | 260 874.59± 13 223.15 a | 258 361.75± 15 204.97 a | 256 594.77± 4 178.67 a | 261 370.52± 5 712.12 a | 256 966.71± 7 056.21 a | 254 826.37± 4 188.89 a | |
有机碳 Soil organic carbon | 0—20 | 22 267.02± 1 922.75 b | 23 152.62± 3 218.18 ab | 23 479.73± 2 715.47 ab | 23 912.50± 636.84 ab | 25 709.54± 3 894.13 ab | 22 796.16± 854.17 b | 23 036.36± 591.34 ab | 24 128.67± 1 392.37 ab | 27 332.38± 3 538.52 a |
0—100 | 81 298.69± 7 116.25 a | 76 979.00± 3 804.15 a | 77 280.49± 6 323.96 a | 82 505.57± 7 224.11 a | 79 702.84± 11 278.76 a | 81 117.15± 4 082.41 a | 80 513.88± 7 012.76 a | 82 571.14± 6 221.82 a | 92 737.04± 12 507.45 a | |
硝态氮 Nitrate nitrogen | 0—20 | 21.80± 2.98 d | 22.96± 2.39 cd | 22.11± 0.08 cd | 25.98± 4.29 cd | 23.08± 2.78 cd | 32.75± 2.75 ab | 25.62± 5.36 cd | 28.66± 1.40 bc | 36.72± 1.81 a |
0—100 | 93.90± 25.56 a | 95.97± 5.02 a | 134.28± 1.26 a | 118.08± 18.89 a | 134.73± 41.33 a | 125.67± 38.28 a | 110.92± 31.82 a | 111.35± 15.70 a | 106.20± 9.45 a | |
铵态氮 Ammonium nitrogen | 0—20 | 6.09± 3.81 bc | 13.51± 5.47 abc | 9.65± 2.16 abc | 7.19± 1.58 bc | 7.25± 1.80 bc | 9.80± 3.21 abc | 16.20± 3.73 a | 14.27± 4.31 ab | 9.42± 3.62 abc |
0—100 | 27.66± 16.38 a | 42.15± 12.42 a | 33.96± 11.93 a | 25.08± 4.70 a | 25.05± 9.30 a | 36.31± 10.76 a | 45.51± 8.35 a | 42.99± 15.20 a | 27.75± 9.71 a | |
有效磷 Available phosphorus | 0—20 | 40.24± 3.11 a | 40.63± 3.72 a | 44.88± 5.59 a | 40.72± 3.53 a | 45.40± 2.53 a | 41.06± 1.36 a | 50.07± 1.03 a | 49.77± 8.96 a | 51.79± 17.13 a |
0—100 | 113.84± 10.63 a | 114.07± 5.32 a | 117.78± 2.36 a | 110.56± 8.11 a | 113.07± 3.57 a | 116.35± 10.67 a | 122.68± 5.92 a | 129.68± 23.44 a | 139.75± 36.83 a | |
速效钾 Available potassium | 0—20 | 312.67± 16.15 b | 351.37± 92.65 ab | 351.40± 21.57 ab | 355.48± 42.91 ab | 333.38± 30.35 b | 315.95± 51.22 b | 385.22± 20.00 ab | 388.72± 14.32 ab | 417.35± 53.36 a |
t0—100 | 1 479.92± 156.34 a | 1 422.16± 149.67 a | 1 468.14± 80.54 a | 1 513.90± 292.61 a | 1 531.87± 70.58 a | 1 321.63± 57.89 a | 1 397.39± 48.18 a | 1 461.09± 64.80 a | 1 573.05± 213.14 a |
表1 不同处理下冬小麦季土壤养分的累积量 (kg·hm-2)
Table 1 Accumulation amounts of soil nutrient under different treatments in winter wheat season
指标 Index | 土层 Soil layer/cm | CK | B0.5 | B1.0 | B1.5 | B2.0 | S0.5 | S1.0 | S1.5 | S2.0 |
---|---|---|---|---|---|---|---|---|---|---|
全氮 Total nitrogen | 0—20 | 2 168.92± 104.89 ab | 2 307.50± 85.06 ab | 2 240.78± 98.02 ab | 2 162.40± 22.62 ab | 2 336.88± 175.87 ab | 2 088.75± 141.74 b | 2 354.15± 125.05 a | 2 374.88± 71.08 a | 2 411.18± 259.52 a |
0—100 | 8 521.53± 643.67 a | 8 388.45± 385.08 a | 8 489.34± 365.32 a | 8 767.60± 409.74 a | 8 527.24± 461.42 a | 8 621.05± 541.79 a | 8 691.36± 717.75 a | 8 667.83± 455.71 a | 9 382.16± 896.55 a | |
全磷 Total phosphorus | 0—20 | 2 080.23± 127.10 a | 2 217.71± 14.57 a | 2 186.92± 162.75 a | 2 091.40± 20.89 a | 2 221.95± 103.42 a | 2 083.45± 91.77 a | 2 136.95± 79.81 a | 2 087.65± 41.15 a | 2 267.58± 370.27 a |
0—100 | 8 901.13± 367.37 a | 8 964.10± 207.84 a | 8 809.04± 325.36 a | 8 752.81± 245.98 a | 8 792.37± 47.35 a | 8 850.00± 483.89 a | 8 951.65± 251.07 a | 8 963.81± 35.14 a | 9 473.29± 785.11 a | |
全钾 Total potassium | 0—20 | 49 517.63± 431.16 a | 50 192.91± 989.94 a | 50 444.92± 1 023.15 a | 50 525.82± 1 433.89 a | 49 837.27± 3 364.12 a | 50 544.25± 69.68 a | 51 230.22± 1 950.48 a | 51 487.85± 2 374.28 a | 50 620.47± 729.05 a |
0—100 | 254 045.00± 4 553.47 a | 256 166.48± 2 126.81 a | 258 129.48± 2 192.89 a | 260 874.59± 13 223.15 a | 258 361.75± 15 204.97 a | 256 594.77± 4 178.67 a | 261 370.52± 5 712.12 a | 256 966.71± 7 056.21 a | 254 826.37± 4 188.89 a | |
有机碳 Soil organic carbon | 0—20 | 22 267.02± 1 922.75 b | 23 152.62± 3 218.18 ab | 23 479.73± 2 715.47 ab | 23 912.50± 636.84 ab | 25 709.54± 3 894.13 ab | 22 796.16± 854.17 b | 23 036.36± 591.34 ab | 24 128.67± 1 392.37 ab | 27 332.38± 3 538.52 a |
0—100 | 81 298.69± 7 116.25 a | 76 979.00± 3 804.15 a | 77 280.49± 6 323.96 a | 82 505.57± 7 224.11 a | 79 702.84± 11 278.76 a | 81 117.15± 4 082.41 a | 80 513.88± 7 012.76 a | 82 571.14± 6 221.82 a | 92 737.04± 12 507.45 a | |
硝态氮 Nitrate nitrogen | 0—20 | 21.80± 2.98 d | 22.96± 2.39 cd | 22.11± 0.08 cd | 25.98± 4.29 cd | 23.08± 2.78 cd | 32.75± 2.75 ab | 25.62± 5.36 cd | 28.66± 1.40 bc | 36.72± 1.81 a |
0—100 | 93.90± 25.56 a | 95.97± 5.02 a | 134.28± 1.26 a | 118.08± 18.89 a | 134.73± 41.33 a | 125.67± 38.28 a | 110.92± 31.82 a | 111.35± 15.70 a | 106.20± 9.45 a | |
铵态氮 Ammonium nitrogen | 0—20 | 6.09± 3.81 bc | 13.51± 5.47 abc | 9.65± 2.16 abc | 7.19± 1.58 bc | 7.25± 1.80 bc | 9.80± 3.21 abc | 16.20± 3.73 a | 14.27± 4.31 ab | 9.42± 3.62 abc |
0—100 | 27.66± 16.38 a | 42.15± 12.42 a | 33.96± 11.93 a | 25.08± 4.70 a | 25.05± 9.30 a | 36.31± 10.76 a | 45.51± 8.35 a | 42.99± 15.20 a | 27.75± 9.71 a | |
有效磷 Available phosphorus | 0—20 | 40.24± 3.11 a | 40.63± 3.72 a | 44.88± 5.59 a | 40.72± 3.53 a | 45.40± 2.53 a | 41.06± 1.36 a | 50.07± 1.03 a | 49.77± 8.96 a | 51.79± 17.13 a |
0—100 | 113.84± 10.63 a | 114.07± 5.32 a | 117.78± 2.36 a | 110.56± 8.11 a | 113.07± 3.57 a | 116.35± 10.67 a | 122.68± 5.92 a | 129.68± 23.44 a | 139.75± 36.83 a | |
速效钾 Available potassium | 0—20 | 312.67± 16.15 b | 351.37± 92.65 ab | 351.40± 21.57 ab | 355.48± 42.91 ab | 333.38± 30.35 b | 315.95± 51.22 b | 385.22± 20.00 ab | 388.72± 14.32 ab | 417.35± 53.36 a |
t0—100 | 1 479.92± 156.34 a | 1 422.16± 149.67 a | 1 468.14± 80.54 a | 1 513.90± 292.61 a | 1 531.87± 70.58 a | 1 321.63± 57.89 a | 1 397.39± 48.18 a | 1 461.09± 64.80 a | 1 573.05± 213.14 a |
指标 Index | 土层 Soil layer/cm | CK | B0.5 | B1.0 | B1.5 | B2.0 | S0.5 | S1.0 | S1.5 | S2.0 |
---|---|---|---|---|---|---|---|---|---|---|
全氮 Total nitrogen | 0—20 | 2 050.87± 208.67 a | 2 186.26± 232.29 a | 2 199.00± 214.35 a | 2 090.71± 235.51 a | 2 239.13± 199.89 a | 2 129.38± 333.82 a | 2 029.74± 149.62 a | 2 207.19± 148.29 a | 2 135.85± 101.16 a |
0—100 | 8 331.35± 933.80 a | 8 237.71± 1 194.90 a | 8 634.02± 443.11 a | 8 295.32± 531.82 a | 8 111.68± 656.90 a | 8 103.49± 614.90 a | 8 105.31± 768.23 a | 8 096.48± 441.12 a | 8 252.27± 376.63 a | |
全磷 Total phosphorus | 0—20 | 2 298.53± 249.49 a | 2 468.79± 208.77 a | 2 381.00± 33.90 a | 2 379.57± 215.23 a | 2 313.50± 142.46 a | 2 352.68± 197.47 a | 2 311.00± 18.70 a | 2 334.06± 90.25 a | 2 379.09± 14.78 a |
0—100 | 9 736.75± 395.68 a | 9 818.64± 399.85 a | 9 515.27± 323.53 a | 9 668.83± 625.90 a | 9 491.85± 485.75 a | 9 563.05± 469.59 a | 9 325.33± 212.73 a | 9 542.98± 131.02 a | 9 493.53± 70.14 a | |
全钾 Total potassium | 0—20 | 50 049.41±312.91 a | 50 570.90±514.47 a | 51 324.27± 4 598.43 a | 54 233.93± 3 338.58 a | 53 083.99±282.11 a | 51 113.37± 2 101.14 a | 52 352.49± 1 700.32 a | 52 099.85± 3 286.78 a | 51 351.83± 1 088.13 a |
0—100 | 250 930.15± 1 192.25 a | 259 503.38± 5 212.26 a | 261 026.68± 12 722.22 a | 275 395.94± 13 968.95 a | 266 786.99± 8 803.38 a | 267 464.63± 10 031.97 a | 270 037.82± 10 594.57 a | 264 554.33± 6 214.4 a | 263 346.22± 6 788.46 a | |
有机碳 Soil organic carbon | 0—20 | 20 251.07±736.70 a | 20 472.99±931.48 a | 20 374.05±762.54 a | 20 268.03±809.38 a | 20 805.16±286.81 a | 20 995.98±489.68 a | 20 508.33±235.55 a | 20 692.08±464.74 a | 21 190.33±642.31 a |
0—100 | 77 809.97± 6 580.10 a | 71 727.76± 9 087.41a | 77 925.87± 4 093.09 a | 74 088.27± 4 776.35 a | 73 961.06± 1 677.03 a | 79 219.21± 4 388.16 a | 78 046.02± 4 098.05 a | 76 067.15± 1 846.93 a | 76 607.80±224.06 a | |
硝态氮 Nitrate nitrogen | 0—20 | 30.02± 3.83 b | 30.58± 3.09 b | 42.71± 6.06 a | 34.05± 4.57 ab | 39.53± 0.06 ab | 32.24± 4.39 ab | 31.89± 9.72 ab | 41.34± 4.85 ab | 39.83± 6.91 ab |
0—100 | 99.58± 13.42 ab | 103.40± 28.01 ab | 129.21± 19.92 a | 102.47± 11.42 ab | 101.62± 7.18 ab | 96.97± 12.23 ab | 92.16± 24.90 b | 109.09± 17.37 ab | 111.70± 8.28 ab | |
铵态氮 Ammonium nitrogen | 0—20 | 5.13± 0.83 a | 5.81± 1.08 a | 5.49± 0.66 a | 5.87± 1.24 a | 5.83± 0.36 a | 5.89± 0.91 a | 5.61± 1.30 a | 5.43± 1.25 a | 4.77± 0.47 a |
0—100 | 18.68± 3.50 a | 18.62± 2.91 a | 18.60± 1.63 a | 19.19± 0.18 a | 20.31± 0.19 a | 17.73± 0.97 a | 18.10± 4.53 a | 18.88± 4.70 a | 16.10± 3.52 a | |
有效磷 Available phosphorus | 0—20 | 33.99± 5.49 a | 35.86± 12.27 a | 40.72± 2.30 a | 34.91± 9.03 a | 32.34± 7.14 a | 38.75± 7.56 a | 37.77± 7.82 a | 35.76± 3.49 a | 34.88± 9.45 a |
0—100 | 91.27± 12.63 a | 97.90± 22.55 a | 102.33± 14.41 a | 88.91± 27.19 a | 89.53± 7.34 a | 97.51± 11.51 a | 93.30± 23.21 a | 82.67± 15.94 a | 81.18± 9.16 a | |
速效钾 Available potassium | 0—20 | 341.86± 22.82 bc | 354.42± 98.98 bc | 352.48± 28.69 bc | 352.32± 48.94 bc | 287.45± 13.15 c | 367.69± 30.73 ab | 378.94± 34.88 ab | 389.00± 17.17 ab | 430.86± 5.98 a |
0—100 | 1 433.36± 50.20 bc | 1 416.41± 187.52 bc | 1 436.37± 40.04 bc | 1 410.87± 29.72 bc | 1 287.67± 49.50 c | 1 497.01± 80.99 b | 1 424.10± 60.12 bc | 1 502.69± 91.82 b | 1 640.02± 40.69 a |
表2 不同处理下夏玉米季土壤养分的累积量 (kg·hm-2)
Table 2 Accumulation amounts of soil nutrient under different treatments in summer maize season
指标 Index | 土层 Soil layer/cm | CK | B0.5 | B1.0 | B1.5 | B2.0 | S0.5 | S1.0 | S1.5 | S2.0 |
---|---|---|---|---|---|---|---|---|---|---|
全氮 Total nitrogen | 0—20 | 2 050.87± 208.67 a | 2 186.26± 232.29 a | 2 199.00± 214.35 a | 2 090.71± 235.51 a | 2 239.13± 199.89 a | 2 129.38± 333.82 a | 2 029.74± 149.62 a | 2 207.19± 148.29 a | 2 135.85± 101.16 a |
0—100 | 8 331.35± 933.80 a | 8 237.71± 1 194.90 a | 8 634.02± 443.11 a | 8 295.32± 531.82 a | 8 111.68± 656.90 a | 8 103.49± 614.90 a | 8 105.31± 768.23 a | 8 096.48± 441.12 a | 8 252.27± 376.63 a | |
全磷 Total phosphorus | 0—20 | 2 298.53± 249.49 a | 2 468.79± 208.77 a | 2 381.00± 33.90 a | 2 379.57± 215.23 a | 2 313.50± 142.46 a | 2 352.68± 197.47 a | 2 311.00± 18.70 a | 2 334.06± 90.25 a | 2 379.09± 14.78 a |
0—100 | 9 736.75± 395.68 a | 9 818.64± 399.85 a | 9 515.27± 323.53 a | 9 668.83± 625.90 a | 9 491.85± 485.75 a | 9 563.05± 469.59 a | 9 325.33± 212.73 a | 9 542.98± 131.02 a | 9 493.53± 70.14 a | |
全钾 Total potassium | 0—20 | 50 049.41±312.91 a | 50 570.90±514.47 a | 51 324.27± 4 598.43 a | 54 233.93± 3 338.58 a | 53 083.99±282.11 a | 51 113.37± 2 101.14 a | 52 352.49± 1 700.32 a | 52 099.85± 3 286.78 a | 51 351.83± 1 088.13 a |
0—100 | 250 930.15± 1 192.25 a | 259 503.38± 5 212.26 a | 261 026.68± 12 722.22 a | 275 395.94± 13 968.95 a | 266 786.99± 8 803.38 a | 267 464.63± 10 031.97 a | 270 037.82± 10 594.57 a | 264 554.33± 6 214.4 a | 263 346.22± 6 788.46 a | |
有机碳 Soil organic carbon | 0—20 | 20 251.07±736.70 a | 20 472.99±931.48 a | 20 374.05±762.54 a | 20 268.03±809.38 a | 20 805.16±286.81 a | 20 995.98±489.68 a | 20 508.33±235.55 a | 20 692.08±464.74 a | 21 190.33±642.31 a |
0—100 | 77 809.97± 6 580.10 a | 71 727.76± 9 087.41a | 77 925.87± 4 093.09 a | 74 088.27± 4 776.35 a | 73 961.06± 1 677.03 a | 79 219.21± 4 388.16 a | 78 046.02± 4 098.05 a | 76 067.15± 1 846.93 a | 76 607.80±224.06 a | |
硝态氮 Nitrate nitrogen | 0—20 | 30.02± 3.83 b | 30.58± 3.09 b | 42.71± 6.06 a | 34.05± 4.57 ab | 39.53± 0.06 ab | 32.24± 4.39 ab | 31.89± 9.72 ab | 41.34± 4.85 ab | 39.83± 6.91 ab |
0—100 | 99.58± 13.42 ab | 103.40± 28.01 ab | 129.21± 19.92 a | 102.47± 11.42 ab | 101.62± 7.18 ab | 96.97± 12.23 ab | 92.16± 24.90 b | 109.09± 17.37 ab | 111.70± 8.28 ab | |
铵态氮 Ammonium nitrogen | 0—20 | 5.13± 0.83 a | 5.81± 1.08 a | 5.49± 0.66 a | 5.87± 1.24 a | 5.83± 0.36 a | 5.89± 0.91 a | 5.61± 1.30 a | 5.43± 1.25 a | 4.77± 0.47 a |
0—100 | 18.68± 3.50 a | 18.62± 2.91 a | 18.60± 1.63 a | 19.19± 0.18 a | 20.31± 0.19 a | 17.73± 0.97 a | 18.10± 4.53 a | 18.88± 4.70 a | 16.10± 3.52 a | |
有效磷 Available phosphorus | 0—20 | 33.99± 5.49 a | 35.86± 12.27 a | 40.72± 2.30 a | 34.91± 9.03 a | 32.34± 7.14 a | 38.75± 7.56 a | 37.77± 7.82 a | 35.76± 3.49 a | 34.88± 9.45 a |
0—100 | 91.27± 12.63 a | 97.90± 22.55 a | 102.33± 14.41 a | 88.91± 27.19 a | 89.53± 7.34 a | 97.51± 11.51 a | 93.30± 23.21 a | 82.67± 15.94 a | 81.18± 9.16 a | |
速效钾 Available potassium | 0—20 | 341.86± 22.82 bc | 354.42± 98.98 bc | 352.48± 28.69 bc | 352.32± 48.94 bc | 287.45± 13.15 c | 367.69± 30.73 ab | 378.94± 34.88 ab | 389.00± 17.17 ab | 430.86± 5.98 a |
0—100 | 1 433.36± 50.20 bc | 1 416.41± 187.52 bc | 1 436.37± 40.04 bc | 1 410.87± 29.72 bc | 1 287.67± 49.50 c | 1 497.01± 80.99 b | 1 424.10± 60.12 bc | 1 502.69± 91.82 b | 1 640.02± 40.69 a |
图5 不同处理下冬小麦-夏玉米的籽粒产量注:不同小写字母表示同季不同处理间差异在P<0.05水平显著。
Fig. 5 Grain yield of winter wheat-summer maize under different treatmentsNote: Different lowercase letters indicate significant differences between different treatments in same season at P<0.05 level.
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