نتایج جستجو برای: soil quality index sqi

تعداد نتایج: 1270161  

Journal: :Frontiers in forests and global change 2022

Soil quality evaluation is the foundation for understanding current situation of soil and promoting sustainable utilization land resources. However, impacts different long-term afforestation timescales on in a typical watershed valley area still insufficient. Here, based samples collected from years 2, 5, 11, 15, 31 natural sample plots with similar site conditions same region, gray target mode...

2015
Osamu Matsuda Masashi Hara Hiroyuki Tobita Kenichi Yazaki Toshinori Nakagawa Kuniyoshi Shimizu Akira Uemura Hajime Utsugi Wujun Ma

Regeneration of planted forests of Cryptomeria japonica (sugi) and Chamaecyparis obtuse (hinoki) is the pressing importance to the forest administration in Japan. Low seed germination rate of these species, however, has hampered low-cost production of their seedlings for reforestation. The primary cause of the low germinability has been attributed to highly frequent formation of anatomically un...

2012
Robert J. Kremer Linda F. Hezel

Ecologically based farming conserves and improves the soil resource and protects environmental quality by using organic or natural resources without the application of synthetic chemicals. Soil quality assessment indicates the ability of management systems to optimize soil productivity and to maintain its structural and biological integrity. Our objective was to evaluate the effect of ecologica...

Journal: :Forests 2021

The soil quality index (SQI) is based on several key indicators and used to assess quality. More than 250,000 ha of walnut saplings (Juglans regia L.) were planted in previous cropland areas the Sichuan Basin, China, using a range cover types that may affect with effects are unclear. We investigated white film (WF), black (BF), shade netting (SN), maize straw (MS) an uncovered control type (CK)...

Journal: :Plants 2023

Elucidating the correlation between soil microbial communities and forest productivity is focus of research in field ecology. Nonetheless, relationship stand age, quality, microorganisms, their combined influence on still unclear. In this study, five development stages (14, 25, 31, 39, >80 years) larch (Larix principis-rupprechtii) forests were investigated Inner Mongolia Shanxi provinces Ch...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان - دانشکده جنگلداری و مهندسی چوب و کاغذ 1391

درک الگوی توزیع مکانی ماکروفون خاک بدلیل اثرات آن روی فرآیندهای اکوسیستم بسیار مهم است. لیکن اطلاعات کمی در این خصوص وجود دارد. درمورد تنوع زیستی ارگانیسم ها وجانداران خاکزی که ازاجزای مهم وکلیدی درهرسیستم اکولوژیکی هستند و در بهبود حاصلخیزی خاک و تولیدات زمین وپایداری اکوسیستم ها(ازطریق فرآیندهای بیولوژیک)نقش عمده دارند تحقیقات کمی انجام شده است. این تحقیق جهت بررسی الگوی مکانی پارامترهای تنوع...

Journal: :Eurasian journal of soil science 2021

Land degradation especially as a result of the rapid increase in demand and pressure population, have emerged one most important problems. Many model approaches, regarding land desertification, been developed continue to be on world. The MEDALUS (Mediterranean Desertification Use) which is famous models has for an environment assessment program contributed by 31 groups 10 countries 1999. This i...

2017
Maurício R. Cherubin Cássio A. Tormena Douglas Karlen Maurício Roberto Cherubin Cássio Antônio Tormena Douglas L. Karlen

The Soil Management Assessment Framework (SMAF) was developed in the U.S.A. and has been used as a tool for assessing and quantifying changes in soil quality/health (SQ) induced by land uses and agricultural practices in that region and elsewhere throughout the world. An initial study using SMAF in Brazil was recently published, but additional research for a variety of soils and management syst...

2002
S. S. Andrews D. L. Karlen

Consultants, farm advisors, resource conservationists, and other land managers may benefit from decision tools that help identify the most sustainable management practices. Indices of soil quality (SQIs) can provide this service. Various methods were tested for choosing a minimum data set (MDS), transforming the indicators, and calculating indices using data from alternative vegetable productio...

2017
Yang Yang Wang Ting Liu Xiao Fu Shufei Tan Wangxiao Wang Xiaoying Gao Xiumei Zhang Boli

Background. Immunosuppression is a well-recognised complication of chemotherapy in cancer patients. We assemble the clinical evidence that SQI, an adjuvant drug for lung cancer and gastric cancer which was widely prescribed in China, interventions could increase objective tumour response and regulate immunity in cancer patients undergoing chemotherapy. Methods. We undertook a systemic review of...

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