| 引用本文: | 叶 浩,黄必善,熊威,等.蓄雨灌溉对农田养分和水稻生长的影响[J].灌溉排水学报,2022,():-. |
| Ye Hao,Huang Bi-shan,Xiong Wei,et al.蓄雨灌溉对农田养分和水稻生长的影响[J].灌溉排水学报,2022,():-. |
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| 摘要: |
| 【目的】探寻蓄雨灌溉对农田养分及作物的影响,为蓄雨灌溉提供理论依据。【方法】以水稻浅水勤灌为对照,并基于浅水勤灌设置3种蓄雨上限(TR1-TR3,依次蓄雨100 mm、80 mm、60 mm),在自然条件下开展水稻蓄雨灌溉试验。【结果】2年试验结果表明：①4种处理0~20 cm(表层)、20~40 cm(深层)土壤养分碱解氮、速效磷、速效钾在5%水平无显著差异；②TR1~TR3表层碱解氮平均高于深层20.0%,表层速效磷平均高于深层85.0%,表层速效钾平均高于深层66.8%。随生育期变化,蓄雨灌溉处理表层土壤的碱解氮逐渐下降,深层逐渐上升；表层和深层土壤速效磷逐渐上升；表层和深层速效钾逐渐下降；③4种处理的有效分蘖、穗长、结实率、千粒重在5%水平无显著差异。【结论】蓄雨灌溉可以提高表层碱解氮、速效磷和速效钾,其中蓄雨80 mm综合效益最佳。 |
| 关键词: 水稻;农艺指标;蓄雨灌溉;土壤养分 |
| DOI： |
| 分类号:S27 |
| 基金项目:湖北省水利厅重点项目“江汉平原蓄雨技术研究”(HBSLKY201804)和国家重点研发计划项目“稻田精准控水扩容技术研究”(2016YFD0800503)资助。 |
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| Impacts of Rainwater Storage Irrigation on Farmland Nutrients and Rice Growth |
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Ye Hao1,2, Huang Bi-shan1, Xiong Wei1, Wang Shu-bin1
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1.Tianmen Experiment Station of Farmland Irrigation and Drainage;2.Tianmen Bureau of Water Resources and Lakes
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| Abstract: |
| 【Objective】To provide scientific basis for rain storage irragaition, the trail explored the effect of rain storage irrigation on farmland nutrients and crops.【Method】shallow water frequent irrigation was CK, based on shallow water frequent irrigation, and three kinds of rain storage upper limits (TR1-TR3, rain storage 100 mm, 80 mm, 60 mm) were designed, rain storage irrigation trail was conducted under natural conditions.【Result】The results of the two-year trail show that:①rain storage irragation has no effect on available nitrogen, available phosphorus, available potassium at the level of 5% in soil nutrients of 0-20 cm (surface soil) and 20-40 cm (deep soil); ②The surface available nitrogen of TR1-TR3 was 20.0 % higher than that of the deep soil; the surface available phosphorus was 85.0 % higher than that of the deep soil; the surface available potassium was 66.8 % higher than that of the deep soil. With the change of growth period, the surface available nitrogen of the rain storage irrigation treatment decreased gradually, and the deep soil increased gradually. Surface and deep soil available phosphorus gradually increased ; the surface and deep available potassium decreased gradually; ③There was no significant difference in effective tillering, panicle length, seed setting rate and 1 000-grain weight among the four treatments at the 5% level. 【Conclusion】Rain storage irrigation can increase surface available nitrogen, available phosphorus and available potassium, and 80 mm rain storage has the best comprehensive benefit. |
| Key words: Rice; Agronomic indicators; Rain storage irrigation; Soil nutrients |
