Focused on the rainfall characteristics and the reality of agricultural production in the loess tableland , and based on previous results, new patterns for dryland winter wheat production, in which the emphasis was pu...Focused on the rainfall characteristics and the reality of agricultural production in the loess tableland , and based on previous results, new patterns for dryland winter wheat production, in which the emphasis was put on the film mulch with obvious water-preserving advantage, were designed to make effective use of rainfall. The results showed that the technique of the double mulch of film plus straw in summer fallow period can collect the rainfall in this period to the utmost extent and over 73.2% of it can be stored in the soil, which is 108. 4 mm more than that of conventional tillage. Furthermore, it can not only preserve water stored in soil in summer fallow, but also collect the rainfall in the growth period as much as possible by using the technique of making ridges plus film mulching and furrow sowing. So the patterns, which can greatly increase both the soil moisture and wheat yield, are the best choice for making full utilization of the rainfall and achieving a high and stable yield in the dryland wheat production of the loess tableland.展开更多
在黄土高原地区,交通路网是影响地球关键带过程的一个重要人类活动影响因素,通常与暴雨叠加作用加速黄土关键带水土流失和物质迁移。董志塬是黄土高原面积最大、最连续的塬面,素有“天下黄土第一塬”之称。随着城市化进程的加快,董志塬...在黄土高原地区,交通路网是影响地球关键带过程的一个重要人类活动影响因素,通常与暴雨叠加作用加速黄土关键带水土流失和物质迁移。董志塬是黄土高原面积最大、最连续的塬面,素有“天下黄土第一塬”之称。随着城市化进程的加快,董志塬交通道路网络快速扩张,对塬区景观生态和水土流失产生了重要影响。本数据集基于多源数据,包括历史文献、实地调查、Open Street Map(OSM)数据,利用Arc GIS软件进行目视解译、数据矢量化,并叠加高精度影像对数据进行逐一核对,最终得到了董志塬1975、2005和2020年三期路网矢量数据。本数据集从收集、处理分析到验证均控制严格,数据解译完成后再进行分幅检查,保证数据精度。本数据集的建立与共享,期望为董志塬固沟保塬工程和土地资源管理提供重要的数据支持。展开更多
基金This study was supported by the National High-Tech Research and Development Plan(the“863”Plan of China,2002AA2Z4021)the National Natural Science Foundation of China(30070439)the National Key Project for the"Ninth Five Year"Plan,China(96-004-05-08).
文摘Focused on the rainfall characteristics and the reality of agricultural production in the loess tableland , and based on previous results, new patterns for dryland winter wheat production, in which the emphasis was put on the film mulch with obvious water-preserving advantage, were designed to make effective use of rainfall. The results showed that the technique of the double mulch of film plus straw in summer fallow period can collect the rainfall in this period to the utmost extent and over 73.2% of it can be stored in the soil, which is 108. 4 mm more than that of conventional tillage. Furthermore, it can not only preserve water stored in soil in summer fallow, but also collect the rainfall in the growth period as much as possible by using the technique of making ridges plus film mulching and furrow sowing. So the patterns, which can greatly increase both the soil moisture and wheat yield, are the best choice for making full utilization of the rainfall and achieving a high and stable yield in the dryland wheat production of the loess tableland.
文摘在黄土高原地区,交通路网是影响地球关键带过程的一个重要人类活动影响因素,通常与暴雨叠加作用加速黄土关键带水土流失和物质迁移。董志塬是黄土高原面积最大、最连续的塬面,素有“天下黄土第一塬”之称。随着城市化进程的加快,董志塬交通道路网络快速扩张,对塬区景观生态和水土流失产生了重要影响。本数据集基于多源数据,包括历史文献、实地调查、Open Street Map(OSM)数据,利用Arc GIS软件进行目视解译、数据矢量化,并叠加高精度影像对数据进行逐一核对,最终得到了董志塬1975、2005和2020年三期路网矢量数据。本数据集从收集、处理分析到验证均控制严格,数据解译完成后再进行分幅检查,保证数据精度。本数据集的建立与共享,期望为董志塬固沟保塬工程和土地资源管理提供重要的数据支持。
