控释尿素基施深度对夏玉米产量和氮素利用的影响
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丁相鹏,李广浩,张吉旺,刘鹏,任佰朝,赵斌
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Effects of Base Application Depths of Controlled Release Urea on Yield and Nitrogen Utilization of Summer Maize
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DING XiangPeng,LI GuangHao,ZHANG JiWang,LIU Peng,REN BaiZhao,ZHAO Bin
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表1 控释尿素基施深度对夏玉米产量及其构成因素的影响
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Table 1 Effects of controlled release urea and fertilization depth on yield and yield components of summer maize
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年份 Year | 处理 Treatment | 穗长 Ear length (cm) | 秃尖长 Bald tip length (cm) | 穗粒数 Kernel number per spike | 千粒重 Weight of 1000-kernels (g) | 产量 Yield (kg·hm-2) | 收获指数 Harvest index | 2013 | CK | 15.97c | 0.54a | 518.26d | 271.4b | 8902.5d | 0.43b | | DP0 | 16.24b | 0.31ab | 540.94c | 283.7ab | 9954.0bc | 0.49ab | | DP5 | 16.74b | 0.17b | 544.79bc | 285.0ab | 10137.5b | 0.51a | | DP10 | 17.22a | 0.19b | 572.71a | 291.8a | 10443.0a | 0.52a | | DP15 | 17.11a | 0.21b | 579.26a | 295.6a | 10492.5a | 0.52a | | DP20 | 16.91a | 0.12b | 562.93ab | 286.4a | 10308.3ab | 0.51a | | DP25 | 16.61b | 0.19b | 526.83cd | 280.3b | 9855.0c | 0.48ab | 2014 | CK | 16.40a | 0.17a | 527.73c | 301.8c | 9315.0d | 0.47b | | DP0 | 17.04a | 0.11ab | 558.13b | 307.0bc | 10122.0c | 0.48b | | DP5 | 16.84a | 0.10ab | 561.53b | 317.0ab | 10406.5b | 0.52ab | | DP10 | 17.12a | 0.03b | 579.33a | 323.3a | 10780.5a | 0.55a | | DP15 | 17.04a | 0.07ab | 576.26a | 326.2a | 10790.5a | 0.55a | | DP20 | 16.81a | 0.15a | 567.48ab | 319.6a | 10526.2ab | 0.54a | | DP25 | 16.63a | 0.09ab | 556.75b | 306.5bc | 10040.5c | 0.51ab | 方差分析 ANOVA | | | | | | | 年份(Y) | NS | ** | ** | ** | ** | NS | 施肥深度(D) | ** | ** | ** | ** | ** | * | 年份×施肥深度(Y×D) | NS | ** | * | * | NS | NS |
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