1. The data of water quality pH dry period normal period C28 7.51 7.47 7.48 7.23 7.2 7.24 C28Chinese cabbage C19 C1wheat C1 7.8 7.76 7.81 7.18 7.15 7.2 C10colza oil C20 C31barley C31 7.82 7.78 7.83 7.25 7.23 7.26 C6/15/24Ðݸû C24 C11mustard C10 7.68 7.65 7.7 7.32 7.29 7.35 C17 C29Without harvesting C11 7.63 7.52 7.71 7.16 7.25 7.04 C6 7.51 7.49 7.54 7.19 7.17 7.21 C26 C25No tillage with water replenishment C25 7.62 7.83 7.41 7.26 7.51 7.11 C17 7.48 7.26 7.65 7.12 7.1 7.19 Total nitrogen(mg/L) dry period normal period C28 1.5 1.47 1.53 0.87 0.86 0.88 C1 1.62 1.48 1.71 0.88 0.76 0.98 C31 1.85 1.63 2.01 1.15 0.94 1.36 C10 1.44 1.63 1.25 0.86 1.03 0.67 C11 1.84 1.67 2.11 0.86 0.78 0.97 C6 2.67 2.45 2.71 1.06 1.17 0.83 C25 2.03 1.84 2.17 0.87 0.74 1.03 C17 1.73 1.52 1.89 0.97 0.74 1.13 Total phosphorus(mg/L) dry period normal period C28 0.251 0.312 0.186 0.134 0.125 0.146 C1 0.231 0.224 0.248 0.124 0.113 0.138 C31 0.312 0.301 0.326 0.136 0.118 0.152 C10 0.308 0.284 0.313 0.128 0.113 0.141 C11 0.247 0.234 0.261 0.128 0.117 0.142 C6 0.297 0.276 0.312 0.152 0.141 0.167 C25 0.304 0.275 0.334 0.178 0.164 0.189 C17 0.253 0.241 0.267 0.128 0.114 0.135 Potassium permanganate(mg/L) dry period normal period C28 5.76 5.34 6.11 4.76 4.21 5.13 C1 4.24 3.98 4.56 5.01 4.73 5.34 C31 7.43 7.02 7.76 5.23 4.91 5.52 C10 5.84 5.53 6.14 4.83 4.41 5.24 C11 5.67 5.24 6.01 5.12 4.86 5.37 C6 4.21 3.94 4.53 4.71 4.36 5.07 C25 4.12 3.94 4.35 4.57 4.39 4.78 C17 4.88 4.65 5.12 5.12 5.43 4.82 BOD(mg/L) dry period normal period C28 3.78 3.46 4.02 5.63 5.34 5.91 C1 3.35 3.12 3.54 5.21 5.03 5.47 C31 6.24 6.01 6.48 4.51 4.32 4.8 C10 4.75 4.42 4.96 5.83 5.57 6.04 C11 4.58 4.39 4.74 5.67 5.24 5.93 C6 3.27 3.04 3.51 4.23 4.52 3.97 C25 3.54 3.21 3.74 4.52 4.73 4.16 C17 3.89 3.61 4.03 5.36 5.12 5.71 4.175 3.9075 4.3775 5.12 4.98375 5.24875 5.1175 4.153 Total suspended solids(mg/L) dry period normal period C28 20.54 18.56 22.37 11.94 10.34 13.42 C1 16.57 13.41 18.87 15.21 13.74 17.69 C31 29.61 27.84 30.97 8.45 7.13 9.86 C10 26.54 24.31 28.67 6.87 5.49 8.32 C11 24.67 20.76 25.66 13.85 12.67 14.69 C6 18.67 16.42 20.06 8.04 8.36 7.71 C25 13.61 12.33 14.58 6.38 5.87 6.78 C17 16.74 13.54 19.67 9.34 7.89 10.77 Total salt content(mg/L) dry period normal period C28 611 583 642 423 401 446 C1 634 607 671 415 443 384 C31 716 753 678 386 357 404 C10 718 746 684 406 435 381 C11 674 648 683 408 387 415 C6 523 501 556 367 342 396 C25 487 453 503 326 314 346 C17 507 486 514 439 418 469 2. The data of soil fertility Area No. Total potassium/(%) Quick available potassium/(mg/kg) Total phosphorus/(%) Quick available phosphorus/(mg/kg) Total nitrogen /(%) Alkali-hydrolyzed nitrogen /(mg/kg) Organic matter /(g/kg) pH K K2O K K2O P P2O5 P P2O5 C1 C1- surface 0.84 1.01 166.4 300.57 0.087 0.198 71.56 163.90 0.052 49.80 11.20 8.65 C1- middle 0.86 1.04 126.2 352.13 0.074 0.169 33.52 76.77 0.040 49.80 18.80 8.83 C1- bottom 0.87 1.05 96.3 216.05 0.075 0.171 25.83 59.16 0.035 43.40 10.00 9.06 C6 C6- surface 0.82 0.99 170.6 265.60 0.079 0.180 45.29 103.72 0.023 44.80 14.30 8.32 C6- middle 0.81 0.98 135.7 163.49 0.067 0.154 18.98 43.46 0.030 42.70 8.31 8.56 C6- bottom 0.81 0.98 161.3 92.10 0.068 0.156 12.77 59.25 0.010 44.40 6.63 8.78 C10 C10- surface 0.79 0.95 245.4 295.79 0.081 0.185 41.08 94.08 0.038 46.20 13.40 8.23 C10- middle 0.87 1.05 190.5 329.60 0.081 0.184 39.07 89.48 0.044 43.50 11.60 8.46 C10- bottom 0.84 1.01 178.5 315.16 0.091 0.209 39.39 90.22 0.030 41.90 14.60 8.56 C11 C11- surface 0.98 1.18 215.0 359.10 0.080 0.184 44.99 103.04 0.038 43.10 11.30 8.12 C11- middle 1.01 1.21 197.7 288.31 0.070 0.160 28.64 65.60 0.016 46.20 5.18 8.26 C11- bottom 0.96 1.16 211.3 314.62 0.060 0.138 11.17 75.58 0.031 42.30 1.14 8.39 C17 C17- surface 1.20 1.44 234.9 383.14 0.092 0.210 47.69 109.23 0.038 68.30 10.80 8.30 C17- middle 1.30 1.57 227.6 374.34 0.054 0.123 34.66 79.38 0.031 72.20 12.30 8.31 C17- bottom 1.37 1.65 206.2 348.45 0.078 0.179 28.98 86.38 0.041 94.30 9.98 8.52 C25 C25- surface 0.79 0.95 289.2 474.02 0.088 0.202 52.50 120.24 0.054 49.00 16.20 8.25 C25- middle 0.82 0.99 259.8 313.15 0.082 0.189 42.88 98.21 0.013 65.20 16.20 8.36 C25- bottom 0.76 0.92 199.8 300.74 0.068 0.155 16.11 86.89 0.032 69.80 17.30 8.55 C28 C28- surface 0.80 0.97 231.8 379.38 0.086 0.197 37.26 85.35 0.045 53.90 11.50 8.53 C28- middle 0.97 1.16 232.1 339.75 0.065 0.149 14.00 52.06 0.026 38.60 12.40 8.69 C28- bottom 0.91 1.10 238.3 307.19 0.063 0.145 9.99 16.88 0.031 33.40 11.30 8.88 C31 C31- surface 0.91 1.10 201.4 342.71 0.070 0.161 14.00 52.06 0.014 49.70 4.51 8.55 C31- middle 0.86 1.03 286.9 345.76 0.086 0.197 34.86 79.84 0.017 67.70 5.22 8.46 C31- bottom 0.91 1.09 228.5 325.35 0.089 0.203 48.09 110.15 0.050 56.10 6.07 8.19 Con 1 Con 1- surface 0.92 1.11 232.6 280.35 0.083 0.131 46.61 106.76 0.053 60.40 16.00 8.60 Con 1- middle 0.91 1.10 225.7 271.98 0.073 0.138 39.27 59.94 0.054 61.90 17.00 8.71 Con 1- bottom 0.91 1.10 224.9 271.06 0.072 0.146 34.65 49.36 0.048 87.60 14.90 8.96 Con 2 Con 2- surface 0.87 1.05 252.8 304.62 0.087 0.198 45.69 104.64 0.055 75.40 15.30 8.66 Con 2- middle 0.81 0.97 237.8 286.58 0.066 0.132 22.38 51.25 0.037 65.90 13.80 8.78 Con 2- bottom 0.90 1.08 246.9 287.59 0.055 0.127 9.79 22.42 0.020 49.60 13.80 8.91