Department of Natural Resources & Environmental Management, University of Hawaii-Manoa, Honolulu, Hawaii 96822, USA.
J Environ Sci Health B. 2009 Nov;44(8):828-43. doi: 10.1080/03601230903238723.
The objective of this study was to evaluate the effects of chicken manure (CM) application rates on nutrient concentrations within and below the root zone of sweet corn (Zea mays L. subsp. mays) under Hawaiian conditions. The research was conducted in leeward (Poamoho) and windward (Waimanalo) areas of Oahu, Hawaii, where contrasts exist in both climatic and soil conditions. Suction cup were used to collect soil solutions from 30 and 60 cm depths. Soil solutions were collected six times during the growing season at each location and analyzed for different nutrients (N, P, K, Ca, Mg, Na, Fe, Mn, Zn, and Cu), nitrate-nitrogen (NO(3)-N), ammonium-nitrogen (NH(4)-N), electrical conductivity (EC), and pH. Analysis showed that CM rates significantly affected the concentration of macro-nutrients below the root zone at Poamoho and within the root zone at Waimanalo. In general, nutrient concentration increased with the increasing rates of CM application. There was a significant effect of CM on micro-nutrients except below the root zone at Poamoho. CM significantly affected NO(3)-N concentration within the root zone for 15, 60 days after planting (DAP) at Poamoho, and 16, 28 DAP at Waimanalo. The effect was also significant on total nitrogen (N) concentration in the root zone across the two growing seasons at Waimanalo. There was a highly significant correlation between total N and NO(3)-N, and EC within and below the root zone.
本研究旨在评估在夏威夷条件下，鸡粪（CM）施用量对甜玉米（Zea mays L. subsp. mays）根区内外养分浓度的影响。该研究在夏威夷瓦胡岛的背风（Poamoho）和迎风（Waimanalo）地区进行，两地的气候和土壤条件存在差异。采用吸力杯从 30 和 60cm 深度采集土壤溶液。在每个地点的生长季节期间，共采集了六次土壤溶液，并对不同养分（N、P、K、Ca、Mg、Na、Fe、Mn、Zn 和 Cu）、硝态氮（NO(3)-N）、铵态氮（NH(4)-N）、电导率（EC）和 pH 值进行了分析。分析表明，CM 施用量显著影响了 Poamoho 根区以下和 Waimanalo 根区内部的大量养分浓度。一般来说，随着 CM 施用量的增加，养分浓度也随之增加。CM 对除 Poamoho 根区以下的微量元素有显著影响。CM 对 Poamoho 种植后 15 和 60 天以及 Waimanalo 种植后 16 和 28 天根区内部的 NO(3)-N 浓度有显著影响。在两个生长季节，CM 对 Waimanalo 根区内部总氮（N）浓度也有显著影响。根区内外总氮（N）与 NO(3)-N 和 EC 之间存在高度显著的相关性。
