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生态学杂志 ›› 2010, Vol. 29 ›› Issue (01): 36-42.

• 研究报告 • 上一篇    下一篇

海水灌溉欧洲菊苣盐肥耦合效应

孙 磊;隆小华;刘兆普**;李 青;李洪燕   

  1. 南京农业大学资源与环境科学学院江苏省海洋生物学重点实验室,南京 210095
  • 出版日期:2010-01-08 发布日期:2010-01-08

Coupling effect of salt and fertilizer on European chicory (Cichorium intybusL.) under seawater irrigation and N and P application.

SUN Lei;LONG Xiao-hua;LIU Zhao-pu;LI Qing;LI Hong-yan   

  1. Key Laboratory of Marine Biology of Jiangsu Province, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
  • Online:2010-01-08 Published:2010-01-08

摘要: 2008年在江苏北部沿海滩涂进行田间试验研究了不同浓度海水灌溉下欧洲菊苣(Cicherium intybus L.)的盐肥耦合效应。结果表明:1)20%海水灌溉下欧洲菊苣肉质根和地上部分生物产量与淡水处理相比没有显著差异,而40%海水灌溉下产量均显著下降;N3(氮用量90 kg·hm-2)水平与N1(氮用量0 kg·hm-2)水平相比,欧洲菊苣肉质根产量与地上部分生物产量可以显著提高;同样,P3(P2O5用量45 kg·hm-2)水平与P1(P2O5用量0 kg·hm-2)水平相比,欧洲菊苣产量亦显著提高。2)各浓度海水灌溉下,随着施氮、磷量的增加菊苣主茎普遍增长和增粗。3)经过海水与氮肥及磷肥的交互作用对总产量影响的分析,可以看出W1N3(淡水,氮用量90 kg·hm-2)和W1P3(淡水,P2O5用量45 kg·hm-2)是优化组合。4)经过海水与氮肥及磷肥的交互作用对籽粒产量影响的分析,可以看出W2N3(20%海水,氮用量90 kg N·hm-2)和W1P2(淡水,P2O5用量22.5 kg·hm-2)是优化的组合。处理因子分析表明:海水、氮肥、磷肥对欧洲菊苣产量具有显著效应,以海水影响最大;总产量的优化组合为W1N3P3(0%海水灌溉、氮用量为90 kg·hm-2、P2O5用量为45 kg·hm-2),籽粒产量的优化组合为W2N3P2(20%海水灌溉、氮用量为90 kg·hm-2、P2O5用量为22.5 kg·hm-2)。

关键词: 中性景观模型, RULE, SimMap, 景观指标

Abstract: A field experiment was conducted on the coastal mudflat in Yancheng of northern Jiangsu Province to study the coupling effect of salt and fertilizer on European chicory (Cichorium intybus L.) under different concentration seawater irrigation and N and P fertilization application. Compared with fresh water irrigation (treatment W1), the yield of C. intybus fleshy root and aerial parts   decreased less under 20% seawater irrigation (treatment W2), but decreased signifi
cantly under 40% seawater irrigation (treatment W3). In the trials of N fertilization, the yield of fleshy root and aerial parts was  higher in treatment N3 (N 90 kg·hm-2) than in treatment N1 (N 0 kg·hm-2); and in the trials of P fertilization, the yield was  higher in treatment P3 (P2O5 45 kg·hm-2) than in treatment P1 (P2O5 0 kg·hm-2). Under the same concentration seawater irrigation, C. intybus main stem grown longer and thicker with increasing N and P application. Treatments W1N3 and W1P3 were the best coupling effect for C. intybus fleshy root and aerial part yield, and treatments W2N3 and W1P2 (fresh water, P2O5 22.5 kg·hm-2) were the best coupling effect for C. intybus seed yield. Seawater, N and P, especially seawater, had significant effects on C. intybus. The best combination of the treatments for C. intybus biological yield was W1N3P3, and that for C. intybus seed yield was W2N3P2.

Key words: Neutral landscape model, RULE, SimMap, Landscape metrics