Department of Natural Resources & Environmental Management, University of Hawaii-Manoa, Honolulu, Hawaii, USA.
J Environ Sci Health B. 2009 Sep;44(7):742-54. doi: 10.1080/03601230903163921.
Two field experiments were conducted at the Waimanalo research station on the island of O'ahu, Hawaii to study the effect of chicken (CM) and dairy (DM) manures on biomass and nutrient concentration in sweet corn roots and shoots. Sweet corn (super sweet 10, Zea Mays L. subsp. mays) was grown for two consecutive growing seasons under four rates of application (0, 168, 337, and 672 kg ha(-1) total N equivalent) and one time (OTA) or two time (TTA) applications of organic manure types and rates. There were significant effects of types, rates, and number of manure applications on dry biomass and macro- and micro-nutrient concentration in roots and shoots tissues. Results of root tissue indicated a significant accumulation of N and C under CM and DM treatments compared with the control treatment. Manure application rates significantly increased the accumulation of N and C in root tissue. Dry weight of roots and shoots and both macro- and micro-nutrient contents in the plant tissues significantly increased under TTA treatment compared with OTA treatment. There was a significant correlation (r(2) = 0.46 to 0.81) between root biomass, macro-, and micro-nutrient contents during both growing seasons. The results of the study indicates that amending soils with CM at the highest application rate provided the best crop performance in terms of root and shoot biomass, crop N, C, and other macro- and micro-nutrients.
两个田间试验在夏威夷瓦胡岛的怀马纳洛研究站进行，以研究鸡粪（CM）和奶牛粪（DM）对甜玉米根系和地上部分生物量和养分浓度的影响。在两个连续的生长季节中，使用四种施用量（0、168、337 和 672 kg ha(-1) 总氮当量）和一种（OTA）或两种（TTA）施用有机粪肥类型和用量，对超甜 10 号甜玉米（Zea Mays L. subsp. mays）进行了种植。粪肥类型、用量和施用次数对根和地上部分组织的干生物量和大量及微量养分浓度有显著影响。与对照处理相比，根组织中 CM 和 DM 处理下 N 和 C 的积累显著。随着粪肥用量的增加，根组织中 N 和 C 的积累显著增加。与 OTA 处理相比，TTA 处理下根和地上部分的干重以及植物组织中的大量和微量养分含量均显著增加。两个生长季节的根生物量与大量和微量养分含量之间存在显著相关性（r(2) = 0.46 至 0.81）。研究结果表明，以最高用量施用 CM 可改良土壤，从而在根和地上部分生物量、作物氮、碳和其他大量和微量养分方面提供最佳的作物表现。
