Results 91 to 100 of about 19,908 (197)
Shuitu Baochi Xuebao, 2004 水土保持林的水源涵养效益是研究森林防止水土流失的一个热点问题。以20世纪80年代末期营造和自然恢复的湿地松林、桤柏混交林、刺槐(灌木)林 、刺槐林 和桤木林为研究对象,选择林冠截留、土壤容重、土壤孔隙度、土壤贮水能力、土壤渗透性和枯落物持水性,作为研究不同水土保持林结构模式水源涵养效益的指标,对不同水土保持林的水源涵养机理和水源涵养效益进行了较深入的研究。结果表明,各水土保持林的水源涵养能力均明显高于农耕地;不同水土保持林结构模式的水源涵养效益也有较大差异。最后提出了桤柏混交林、湿地松林 ...
宫渊波 麻泽龙 陈林武 胡庭兴 张健
doaj
Shuitu Baochi Xuebao, 2005 通过对金沙江干热河谷新银合欢人工林内枯落物层持水特性的试验研究,总结出林内枯落物层的持水特性。结果表明,新银合欢林内枯落物全年凋落总量为7.03 t/hm2,月平均为0.59 t/hm2,枯落物层的厚度为2.14.5cm,其中12月凋落最盛。枯落物的自然含水量月平均为25.27%,最大月出现在8月,与该区域的降水有较好的拟合关系,但存在滞后效应。持水速率在0.5 h内迅速增大,在浸泡48 h后基本达到最大值,在0.5 h内林内枯落物可以吸收1.2 mm的降水,当降水<11.72 ...
方海东 纪中华 杨艳鲜 拜得珍 廖承飞
doaj +2 more sources
Shuitu Baochi Xuebao, 2019 川西高山峡谷区森林较高的地表枯落物储量可能具有较好的水文生态效益，但缺乏研究关注。以川西高山峡谷区6种森林为对象，在雨季调查了不同森林地表枯落物的持水和失水特性。结果表明：（1）川西高山峡谷区林地枯落物蓄积量与最大持水量和有效拦蓄量呈显著正相关，林地枯落物蓄积量为6.90~17.49 t/hm2，最大持水量为1.64~5.42 mm，最大持水率为138.18%~330.09%，有效拦蓄量为0.53~3.33 mm，有效拦蓄率为77.57%~203.02%。（2）相对其他森林，亮叶桦（Betula ...
刘一霖 +7 more
doaj
Shuitu Baochi Xuebao, 2020 为揭示砒砂岩区主要造林树种枯落物持水性能及林下土壤物理性质变化特征，以位于黄土高原北部准格尔旗砒砂岩区6种林分类型为研究对象，运用浸泡法和烘干法，对林下枯落物、土壤（0—50 cm）的持水性能及物理性质进行研究。结果表明：（1）砒砂岩区6种林分类型林下枯落物厚度范围为0.73~2.77 cm，总蓄积量范围为1.47~7.93 t/hm2。枯落物层厚度、总蓄积量大小依次为油松、侧柏、沙棘、柠条锦鸡儿、山杏和撂荒地。枯落物未分解层厚度及其蓄积量均明显大于半分解层。（2）林下枯落物最大持水率范围为149.48%
吴晓光 +6 more
doaj
Responses of Loess Ground with Different Slopes and Vegetation Covers to Rainfall Infiltration [PDF]
[Objective] To investigate the soil moisture response to rainfall in loess ground with different slopes and vegetation types. [Methods] Eight in-situ observation plots were established, including flat surfaces with bare soil, Artemisia cover, and Robinia
HU Xiangyang +6 more
core +1 more source
Effect of Drying Method on Character and Quality of Chaenomeles sinensis (Thouin) Koehne Powder [PDF]
This study aimed to evaluate the character and quality differences in Chaenomeles sinensis (Thouin) Koehne fruit powder processed under various drying conditions, providing a theoretical basis for selecting raw materials in the production of value-added ...
Chao RU +7 more
core +1 more source
Shuitu Baochi Xuebao目的为厘定不同水土保持措施下的径流小区发生产流产沙的场次降雨侵蚀性降雨标准，并探究侵蚀性降雨标准的影响因素。方法利用黄土丘陵区甘肃天水罗玉沟流域桥子沟试验场17个标准径流小区的2011—2020年降雨产流产沙观测资料，采用频率分析法和泥沙连通性IC值，评估不同水土保持措施下侵蚀性降雨标准及其影响因素。结果水土保持措施减小不同径流小区产流产沙，与对照小区相比，草地和林地小区的产流产沙下降最明显，减沙率分别为80.39%和79.78%，农地减沙率明显小于草地和林地，仅为47.41 ...
张继永 +3 more
doaj
Improvement of Frozen Shrimp Surimi Quality by Gelatin Prepared through Hot-pressing of Sturgeon Cartilage and Its Effects on the Myofibrillar Protein [PDF]
This study aimed to investigate the cryoprotective effect of gelatin prepared by hot-pressing sturgeon cartilage (SCG) on myofibrillar protein (MP) in shrimp surimi, with the aim of improving the quality stability of frozen shrimp surimi.
Jiajia TANG +4 more
core +1 more source
Optimization of extraction process of hemp seed protein by reverse micelle method and study on its physicochemical properties and digestibility [PDF]
ObjectiveThe process was optimized and the physicochemical properties of the obtained hemp seed protein, extracted by using reverse micelle method, were analyzed.MethodsThe key factors affecting the extraction rate of protein, such as Aerosol-OT (AOT ...
LI Yunfei +6 more
core +1 more source
Shuitu Baochi Xuebao[目的] 探究不同改性玉米秸秆生物炭混施有机肥对干旱黄土持水保肥能力特性及其作物生长的影响。[方法] 将氮气环境下经500 ℃热解2 h制得的玉米秸秆生物炭,分别在1 mol/L H3PO4、NaOH和NH4Cl试剂中浸渍改性获得不同改性玉米秸秆生物炭。系统表征生物炭的元素组成和孔隙结构等理化特性,开展不同比例炭肥混施下的土壤盆栽试验,分析土壤持水、保肥和植株生长状况等,探明不同生物炭混施有机肥对干旱黄土持水保肥性能的影响。[结果] 生物炭理化特性方面,改性生物炭中氧含量增加4.73%~9.18 ...
张沛祯 +5 more
doaj