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Soil Properties and Plant Growth Response to Litter in a Prolonged Enclosed Grassland of Loess Plateau, China

Journal of Earth Science 2019年第5期30卷 1041-1048页

作者： Yunwu Xiong Bing Yu Mengting Bai Xueyang Zhang Guanhua Huang Alex Furman College of Water Resources & Civil Engineering China Agricultural University Beijing 100083 China Chinese-Israeli International Center for Research and Training in Agriculture China Agricultural University Beijing 100083 China Civil and Environmental Engineering Technion-Israel Institute of Technology Haifa 32000 Israel

The enclosure and ungrazing practices for grassland management result in accumulation of plant litter on soil surface thus affecting the available soil water and nutrients for plant production. We experimentally investigated the effects of litter on soil properties and plant growth in a prolonged enclosure grassland of Loess Plateau, China. Three different litter manipulations were conducted including removal of all litter, an untreated in-situ control with original litter levels, and a double litter treatment. Litter treatment experiments demonstrated that plant litter affected the superficial soil water. Soil water content in plots with in-situ or double litter is generally higher than that with litter removal. The depletion of soil water up to five days post rainfall is fastest in litter removal plots for the top soil, but no evident difference for the deep ones. Different litter treatments have no significant impact on soil total carbon, nitrogen as well as carbon/nitrogen ratio for consecutive two years experiments. Both above-and below-ground biomasses in plots of litter removal were less than those in the plots of in-situ and double litter treatment. Litter affects plant production mainly through the mechanical barrier regulating root zone soil moisture. Therefore, prolonged litter manipulation experiments are desirable to understand the long-term response of plant growth on litter from nutrient aspect.

关键词： soil moisture ungrazed grassland Stripa bungeana litter manipulation

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小叶白蜡播种育苗技术

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林业科技通讯 2019年第9期 78-79页

作者：陈斌丁丽萍张掖市林业科学研究院

本文对小叶白蜡(Fraxinus bungeana)播种育苗的播种时间、播种方式与覆盖方式3个较为重要的因素进行组合试验,以出苗率、苗高、地径作为调查指标,进行比较分析。得出了小叶白蜡播种育苗的最佳组合为春季土壤解冻后(4月15日)采用覆膜点播... 详细信息

本文对小叶白蜡(Fraxinus bungeana)播种育苗的播种时间、播种方式与覆盖方式3个较为重要的因素进行组合试验,以出苗率、苗高、地径作为调查指标,进行比较分析。得出了小叶白蜡播种育苗的最佳组合为春季土壤解冻后(4月15日)采用覆膜点播,用沙盖种的方式进行育苗,效果最佳。

关键词：小叶白蜡 Fraxinus bungeana 播种育苗

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关于中阳县造林树种多样化的探索

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林业科技通讯 2018年第8期 15-17页

作者：王佩文任元英中阳县林业局

根据中阳县县域造林树种的选择历史和保存状况遴选出3个分布范围较广生长良好的树种：白皮松（Pinus bungeana）、华北落叶松（Larix principis-rupprechtii）和五角枫（Acer truncatum）,通过分析其分布区域的立地条件、生境特征,结合... 详细信息

根据中阳县县域造林树种的选择历史和保存状况遴选出3个分布范围较广生长良好的树种：白皮松（Pinus bungeana）、华北落叶松（Larix principis-rupprechtii）和五角枫（Acer truncatum）,通过分析其分布区域的立地条件、生境特征,结合其生物学特性,总结了3个树种的适生环境和在中阳县适宜推广的区域,以利于中阳县造林树种的多样化发展,改善林分结构,发挥森林持续稳定的生态效能。