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On-line Access: 2022-04-22
Received: 2020-11-02
Revision Accepted: 2021-01-03
Crosschecked: 2022-04-22
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Citations: Bibtex RefMan EndNote GB/T7714
Yuqi LIANG, Min LIAO, Zhiping FANG, Jiawen GUO, Xiaomei XIE, Changxu XU. How silicon fertilizer improves nitrogen and phosphorus nutrient availability in paddy soil?[J]. Journal of Zhejiang University Science B,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.B2000708 @article{title="How silicon fertilizer improves nitrogen and phosphorus nutrient availability in paddy soil?", %0 Journal Article TY - JOUR
硅肥如何提高水稻土中氮磷养分有效性?创新点:发现添加适量的硅养分可有效地提高稻田土壤N和P养分的有效性,其核心生态机制是由于适量硅养分的添加可显著增加稻田土壤的土壤微生物活性、氨化细菌和解磷菌的数量、脲酶和磷酸酶的活性以及与N和P养分循环有关的微生物群落群落,进而促进土壤N和P养分土壤养分矿化。 方法:设计了一系列不同硅肥浓度和固定氮磷肥配合施用的土培试验,施硅设置为五个梯度:0、5.2、10.4、15.6和20.8 µg/kg。在25°C培养一个月,分析收获后土壤有效态N和P的含量、土壤微生物活性、氨化细菌和解磷菌的数量、脲酶和磷酸酶的活性以及与土壤微生物群落结构多样性,最后统计分析硅的添加对水稻土N和P养分有效性、土壤微生物活性、氨化细菌和解磷菌的数量、脲酶和磷酸酶的活性以及与土壤微生物群落结构多样性的影响及其相互关系。 结论:适量硅养分的添加可显著增加稻田土壤的土壤微生物活性、氨化细菌和解磷菌的数量、脲酶和磷酸酶的活性以及与N和P养分循环有关的微生物群落群落,进而促进N和P养分土壤养分矿化。当硅施用量为15.6µg/kg时,土壤N和P养分的有效性达到最大值,同时土壤微生物活性、氨化细菌和解磷菌的数量、脲酶和磷酸酶的活性以及与N和P养分循环有关的微生物群落群落也均达到最高水平。另外,土壤速效磷比例(有效磷/总磷(AP/TP))与氨化细菌数、AP/TP和酸性磷酸酶活性、AP/TP和Shannon指数、速效氮比例(有效氮/总氮(AN/TN))与氨化细菌数、AN/TN与酸性磷酸酶活性的相关系数分别为0.9290、0.9508、0.9202、0.9140、0.9366。综上所述,适当补充硅养分可提高稻田土壤N和P养分有效性,有助于提高稻田土壤N和P养分的水稻利用效率。 关键词组: Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article
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