Some thoughts on the factors that controlled prehistoric maize production in the American Southwest with application to southwestern Colorado
Some thoughts on the factors that controlled prehistoric maize production in the American Southwest with application to southwestern Colorado
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DOI：
10.1016/j.jas.2013.03.013
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发表时间：
2013-07-01
影响因子：
2.8
通讯作者：
Petersen, K. L.
中科院分区：
文献类型：
--
作者：
Benson, L. V.;Ramsey, D. K.;Petersen, K. L.
在本文中，我们提出了一个史前科罗拉多西南部玉米生产力模型。该模型基于Mesa Verde从公元480年到2011年水年降水的树木年轮重建。梅萨维德历史降水与其他11个气象站历史降水的相关性使得建立海拔相关降水函数成为可能。Mesa Verde的史前水年降水值与海拔相关的降水函数可以构建自公元480年以来每年科罗拉多西南部的海拔降水等高线，包括30厘米等高线，代表玉米生产所需的最低降水量，50厘米等高线，代表玉米生产所需的最佳降水量。在本文中，计算史前玉米生产力和田间生活在任何特定的海拔也证明。这些计算是通过对科罗拉多州西南部七个土壤组进行的有机氮测量，以及重建水年降水量和有机氮矿化率的估计来完成的。Elsevier Ltd.出版。
In this paper, we present a model of prehistoric southwestern Colorado maize productivity. The model is based on a tree-ring reconstruction of water-year precipitation for Mesa Verde for the period A.D. 480 to 2011. Correlation of historic Mesa Verde precipitation with historic precipitation at 11 other weather stations enabled the construction of an elevation-dependent precipitation function. Prehistoric water-year precipitation values for Mesa Verde together with the elevation-dependent precipitation function allowed construction of the elevation of southwest Colorado precipitation contours for each year since A.D. 480, including the 30-cm contour, which represents the minimum amount of precipitation necessary for the production of maize and the 50-cm contour, which represents the optimum amount of precipitation necessary for the production of maize. In this paper, calculations of prehistoric maize productivity and field life for any specific elevation are also demonstrated. These calculations were performed using organic nitrogen measurements made on seven southwestern Colorado soil groups together with values of reconstructed water-year precipitation and estimations of the organic nitrogen mineralization rate. Published by Elsevier Ltd.