| 灌溉方式及施氮量对枣园土壤磷素形态和有效性的影响 |
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| 引用本文： | 朱耀辉,罗仁杰,李发永,孙涛.灌溉方式及施氮量对枣园土壤磷素形态和有效性的影响[J].节水灌溉,2021(4):41-47. |
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| 作者姓名： | 朱耀辉 罗仁杰 李发永 孙涛 |
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| 作者单位： | 塔里木大学水利与建筑工程学院,新疆阿拉尔843300 |
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| 基金项目： | 大学生创新创业训练计划项目;国家自然科学基金资助项目 |
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| 摘 要： | 在南疆枣园,设置了滴灌和漫灌两种灌溉方式、3种施氮量(102 kg/hm2、204 kg/hm2、306 kg/hm2)处理进行田间试验,通过测定各处理土壤总磷、有效磷及不同磷形态组分的含量,探讨了灌溉方式与氮肥施用量对土壤磷素形态组成及生物有效性的影响.结果表明:土壤总磷含量随滴灌土层深度的增加逐渐下降,而漫灌土层4...
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| 关 键 词： | 灌溉方式 施氮量 有效磷 磷素形态 有机磷 无机磷 |
Effects of Irrigation Method and Nitrogen Application on Soil Phosphorus Forms and Availability in the Jujube Orchard |
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| ZHU Yao-hui,LUO Ren-jie,LI Fa-yong,SUN Tao.Effects of Irrigation Method and Nitrogen Application on Soil Phosphorus Forms and Availability in the Jujube Orchard[J].Water Saving Irrigation,2021(4):41-47. |
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| Authors: | ZHU Yao-hui LUO Ren-jie LI Fa-yong SUN Tao |
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| Institution: | (College of Water Resources and Architectural Engineering,Tarim University,Aral 843300,Xinjiang,China) |
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| Abstract: | In order to find out the effect of different water management methods on the distribution and bioavailability of soil phosphorus(P),this study compared the distribution of total P(TP),available P(AP),and P fractions in an orchard soil between drip irrigation and flood irrigation,and discussed the effects of three nitrogen(N)application amounts(102,204,and 306 kg/hm2)on the contents of different fractions of P(H2O-P,NaHCO3-P,NaOH-P,HCl-P,and residual P)in southern Xinjiang.The results showed that the soil TP content under drip irrigation gradually decreased with soil depths.However,the P content under flood irrigation was the highest at the soil depth of 40 cm.The content of AP in the 0-20 cm soil layer under drip irrigation was significantly higher than that under flood irrigation.The percentage of bioactive P(H2O-P and NaHCO3-P)measured by continuous extraction method in total P gradually decreased with soil depths,and drip irrigation was beneficial to the accumulation of bioactive P in the topsoil.NaHCO3-P was the domain form of bioactive P in the soil under two irrigation methods.However,the average NaHCO3-Po content in flood irrigation soil was 2.4 and 4.2 times of that in drip irrigation soil,while the average NaHCO3-Pi content under drip irrigation was about twice of that under flood irrigation.The bioavailable P fraction increased with N application amounts.The input of N fertilizer increased the content of highly bioactive P,but decreased the contents of HCl-P and residual P in the soil.Therefore,drip irrigation and N application are the effective ways to improve P availability and reduce the risk of P loss. |
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| Keywords: | irrigation method N application effective phosphorus phosphorus form organic phosphorus inorganic phosphorus |
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