水肥“三匀”技术对水稻水、氮利用效率的影响
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杨志远,李娜,马鹏,严田蓉,何艳,蒋明金,吕腾飞,李郁,郭翔,胡蓉,郭长春,孙永健,马均
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Effects of methodical nitrogen-water distribution management on water and nitrogen use efficiency of rice
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Zhi-Yuan YANG,Na LI,Peng MA,Tian-Rong YAN,Yan HE,Ming-Jin JIANG,Teng-Fei LYU,Yu LI,Xiang GUO,Rong HU,Chang-Chun GUO,Yong-Jian SUN,Jun MA
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表7 各土层根干重与氮素积累及水、氮利用的相关性
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Table 7 Correlation of dry weight of root at different soillayers with N accumulation, water and N utilizations
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试验 Experiment | 时期 Stage | 土层深度 DS | 总吸氮量 TNA | 氮肥回收率 NRE | 氮肥农学利用率 NAE | 灌溉水生产效率 IWPE | 水分生产效率 WPE | 试验1 Exp.1 | 拔节期 Jointing stage | 0-10 cm | 0.22NS | 0.33NS | 0.17NS | 0.28NS | 0.34NS | 10-20 cm | 0.25NS | 0.77** | 0.84** | 0.85** | 0.81** | 20-30 cm | 0.13NS | 0.79** | 0.96** | 0.96** | 0.88** | 0-30 cm | 0.27NS | 0.62** | 0.54* | 0.64** | 0.66** | 抽穗期 Heading stage | 0-10 cm | 0.20NS | 0.27NS | 0.35NS | 0.39NS | 0.46NS | 10-20 cm | 0.30NS | 0.65** | 0.64** | 0.71** | 0.71** | 20-30 cm | 0.24NS | 0.61** | 0.76** | 0.85** | 0.80** | 0-30 cm | 0.29NS | 0.52* | 0.61** | 0.68** | 0.72** | 试验2 Exp.2 | 拔节期 Jointing stage | 0-10 cm | 0.61** | 0.52* | 0.45NS | 0.38NS | 0.45NS | 10-20 cm | 0.70** | 0.78** | 0.86** | 0.91** | 0.92** | 20-30 cm | 0.51* | 0.82** | 0.86** | 0.97** | 0.91** | 0-30 cm | 0.73** | 0.72** | 0.69** | 0.66** | 0.71** | 抽穗期 Heading stage | 0-10 cm | 0.63** | 0.55* | 0.39NS | 0.48* | 0.54* | 10-20 cm | 0.67** | 0.72** | 0.81** | 0.80** | 0.83** | 20-30 cm | 0.51* | 0.70** | 0.68** | 0.83** | 0.81** | 0-30 cm | 0.71** | 0.67** | 0.57* | 0.66** | 0.71** | 试验3 Exp.3 | 拔节期 Jointing stage | 0-10 cm | 0.80** | — | — | 0.54** | 0.62** | 10-20 cm | 0.63** | — | — | 0.88** | 0.90** | 20-30 cm | 0.42* | — | — | 0.98** | 0.96** | 0-30 cm | 0.81** | — | — | 0.73** | 0.79** | 抽穗期 Heading stage | 0-10 cm | 0.72** | — | — | 0.63** | 0.69** | 10-20 cm | 0.71** | — | — | 0.81** | 0.85** | 20-30 cm | 0.63** | — | — | 0.85** | 0.86** | 0-30 cm | 0.75** | — | — | 0.73** | 0.78** |
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