Results 61 to 70 of about 576 (142)
Shuitu Baochi Xuebao, 2000 应用化学分析，吸附试验和生物诊断方法，系统研究了风沙土壤磷的有效性和利用率。结果表明：土壤磷素活性高低的顺序为：紧沙土〉轻沙土〉沙土，无机磷盐是风沙区植物所能利用的土壤磷素的主要磷形态，且Ｃａ－Ｐ所占的比例最大。磷固定强弱的顺序为：紧沙土〉轻沙土〉沙土，对各处理土壤进行无机磷形态分级测定表明，磷肥施入土壤以后，在相当长的时间里主要是向Ｃａ２－Ｐ、Ｃａ８－Ｐ转化，Ａｌ－Ｐ和Ｆｅ ...
周涛 于振环
doaj
Shuitu Baochi Xuebao, 2003 通过盆栽试验,选用泥炭和风化煤作为风沙土改良剂,分析其在不同土壤水分条件下对土壤的改良效果以及对白菜生理特性和生长状况的影响。结果表明,施入8%泥炭明显有利于改良风沙土理化性质,表现为土壤容重、总孔隙度、pH值、全N、碱解N、速效P、速效K明显改善;促进了白菜的生长,表现为白菜的蒸腾速率、水分利用效率、高生长和生物量明显优于对照。尽管施入8%风化煤对风沙土的大部分理化性质得到了明显改善,但白菜的生理和生长指标与对照差异不显著。在8%泥炭处理中,土壤水分充足的条件下同微干旱相比 ...
陈伏生 曾德慧 陈广生 王桂荣 张春兴
doaj +2 more sources
Shuitu Baochi Xuebao, 2002 通过考查史迹,充分掌握黄河故道的历史演变,从理论上分析了黄河故道风沙化土地成因,并在此基础上根据对黄河故道风沙化土地综合治理的调查资料以及黄泛区各省林业部门提供的有关技术与模式资料,结合国家林业局批准的,提出了黄河故道风沙化土地的整治原则及思路,归纳、总结出2个典型治理模式,为黄河故道风沙化土地的整治提供借鉴和参考.
张国祯 郭宏忠 陈平平 李卫 范建友
doaj
Effects of Chemical Fertilizer Reduction Combined with Straw and Organic Fertilizer Application on Soil Acidification Mitigation and Erosion Control [PDF]
[Objective] To demonstrate that appropriate application of straw and organic fertilizer can effectively improve soil quality, have a positive effect on soil acidification mitigation and erosion control.
CAO Yunfei +9 more
core +1 more source
Shuitu Baochi Xuebao, 2005 通过风洞实验，在5个风速下对6种不同结构的垄作及平作对照地的土壤风蚀速率、O～20cm风沙流结构进行了模拟观测研究。结果表明：垄作下平均土壤风蚀速率较平作下降低20％～60％。垄作和平作下土壤风蚀速率均随风速的增大呈幂函数递增，但平作下递增较快。风速为15m／s是早作农田土壤风蚀加剧的转折点，当风速大于15m／s时垄作下风蚀速率较平作下明显降低。0～20cm内，平作和垄作下输沙率与高度分别呈负指数和负线性关系。垄作下0～4cm输沙量和输沙量百分比(Q0～4／Q0～20)均低于平作 ...
刘目兴 王静爱 产平 刘连友 李小雁
doaj
Shuitu Baochi Xuebao, 2019 以吉兰泰盐湖防风固沙林体系为对象，通过测定不同部位土壤理化性状，评估该防风固沙林体系防沙治沙效益，并可为干旱区植被恢复提供理论依据。结果表明：（1）吉兰泰盐湖防风固沙林带营建35年后，在林带拦截风蚀物质和植被改良共同作用下，原有流沙质地发生了明显改变。与流动沙垄相比，防护林带土壤细砂及粉粒含量显著增加，其增幅分别为30.55%，500.00%，粗砂含量与流动沙垄相比减少27.00%。（2）防护林带内土壤有机质、速效氮及全氮含量最高，分别是流动沙垄的252%，665%，1 466%；全磷各样地差异不明显 ...
管雪薇, 汪季, 丁延龙, 刘湘杰
doaj
The Impact of Mixed Application of Modified Straw Biochar and Organic Fertilizer on Soil Water Retention and Fertility Maintenance in the Loess Hilly Dry Area [PDF]
[Objective] This study aimed to investigate the effects of different modified corn straw biochars on the water retention and fertilizer conservation capacity of arid loess soil and their effects on crop growth.
CHANG Fangling +5 more
core +1 more source
Propagation phenological phase and fruiting habits of the Nitraria tangutorum in the lower reaches of Shiyang River [PDF]
[Objective] Fruiting habits was the basis for the selection of plant varieties and scientific management, and the investigation of Nitraria tangutorum in the lower reaches of Shiyang River determined the propagation phenological phase and ...
LIU Hujun +5 more
core +1 more source
Shuitu Baochi Xuebao, 2020 为探究不同土壤类型对工程堆积体坡面侵蚀泥沙搬运的影响，选取构筑堆积体的2种扰动土壤，设定4个放水梯度（8，12，16，20 L/min）在32°条件下进行野外冲刷试验。结果表明：2种坡面产流产沙率均随冲刷延时呈"多峰多谷"变化；较扰动风沙土堆积体，扰动红壤堆积体产流产沙率均随流量增加上升速率较缓；流量20 L/min时，重力在扰动风沙土堆积体坡面侵蚀中发挥主导作用；各放水梯度下2种堆积体坡面累积产沙量与累积径流量均呈极显著线性关系（P0.99）；随流量增大，搬运泥沙颗粒组成均接近原状土 ...
陈卓 +6 more
doaj
Response of Soil Respiration to Snowfall in a Kubuqi Salix Plantation Forest of During Freeze-thaw Period [PDF]
[Objective] To investigate the changes of soil respiration in desert ecosystems and its relationship with environmental factors during the spring freeze-thaw period in arid and semi-arid regions, and to provide data support for the carbon budget of sandy
LAN Xiaozhen +8 more
core +1 more source