种植翻压紫云英配施化肥对稻田土壤活性有机碳氮的影响

发布时间：2018-02-22 04:47

本文关键词： 紫云英土壤活性有机碳氮水稻产量氮肥利用率土壤养分　出处：《土壤学报》2017年03期 　论文类型：期刊论文

【摘要】：依托长期种植紫云英定位试验,以不施肥(CK)为对照,研究化肥(100%F)、紫云英配施100%、80%、60%和40%化肥(G+100%F、G+80%F、G+60%F、G+40%F)以及紫云英(G)对土壤活性有机碳氮、水稻产量、氮肥利用率及其他土壤养分的影响。结果表明,与对照不施肥相比,单施化肥对土壤水溶性有机碳(WSOC)的影响很小,土壤水溶性有机氮(WSON)和微生物生物量碳氮(SMBC、SMBN)含量分别增加了20.61%、10.49%和2.20%;单施紫云英处理土壤WSOC、WSON、SMBC和SMBN含量分别增加了25.52%、36.30%、19.16%和10.37%;紫云英配施化肥增加了土壤WSOC、WSON、SMBC和SMBN的含量,增幅分别为12.99%~22.80%、26.66%~56.61%、19.01%~29.56%和16.08%~32.90%。施肥提高了土壤活性有机碳氮占土壤有机碳(SOC)、全氮(TN)的比例,紫云英配施化肥和单施紫云英效果优于单施化肥。土壤活性有机碳氮与水稻产量、SOC、TN和铵态氮(NH_4~+-N)呈显著或极显著正相关。施肥增加水稻产量,G+80%F最高(10026kg hm~(-2))。与100%F相比,化肥减施20%~40%水稻不减产,同时氮肥农学效率和氮肥偏生产力提高,增幅分别为11.64%~149.65%和2.66%~149.92%,土壤SOC、TN和NH_4~+-N含量增加,土壤有效磷和速效钾降低。综合考虑水稻产量、氮肥利用率和土壤肥力,紫云英翻压22500 kg hm~(-2)、磷钾肥常规用量、氮肥减施20%时最优。
[Abstract]:Based on the long-term planting of Zyunyunying, and taking CK without fertilizer as the control, this paper studied the effects of 100% of chemical fertilizer and 100% of Zyunyunying on soil active organic carbon nitrogen and rice yield. The effects of N fertilizer utilization and other soil nutrients on soil water soluble organic carbon (WSOC) were significantly lower than that of control, the results showed that the effect of chemical fertilizer alone on soil water soluble organic carbon (WSOC) was less than that of control. The contents of water-soluble organic nitrogen (WSON) and microbial biomass (SMBCN) increased by 20.61U 10.49% and 2.20% respectively, the contents of SMBC and SMBN increased by 25.52C36.30% and 10.37%, respectively. The increases were 12.990.22.80 and 26.666.66, and 19.01% and 16.08% respectively. Fertilization increased the ratio of soil active organic carbon nitrogen to soil organic carbon (SOC), total nitrogen (TNN), total nitrogen (TNN), total organic carbon (SOC), total nitrogen (TNN), total organic carbon (TOC), total organic carbon (TOC), total nitrogen (TNN), and total organic carbon (TOC). The effects of combined application of chemical fertilizer and single application of Ziyun were better than those of single application of chemical fertilizer. There was a significant or very significant positive correlation between soil active organic carbon nitrogen and rice yield (SOCN) and ammonium nitrogen (NH4 ~ -N). The highest yield of rice was 10026kg / h ~ (-2) ~ (-1), compared with 100F, the highest value of fertilizer application was 10026kg / h ~ (-1) ~ (-1). The agronomic efficiency and partial productivity of nitrogen fertilizer increased by 11.64% 149.65% and 2.66% respectively. The contents of soil SOCN and NH4- N increased, and the available phosphorus and available potassium decreased. Nitrogen use efficiency and soil fertility, 22500 kg / hm ~ (-2) ~ 2 ~ (-1) of Zyunyunxiao, conventional dosage of phosphate and potassium fertilizer, and 20% of nitrogen fertilizer were the best.
【作者单位】：河南省农业科学院植物营养与资源环境研究所;华中农业大学资源与环境学院;中国农业科学院农业资源与农业区划研究所;信阳市农业科学院植物营养与资源环境研究所;
【基金】：河南省省院科技合作项目(132106000052) 公益性行业(农业)科研专项(201103005)共同资助~~
【分类号】：S153.6

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