搜索结果: 1-8 共查到“农学总论 ecosystem”相关记录8条 . 查询时间(0.109 秒)
INFLUENCE OF SKY CONDITIONS ON ESTIMATION OF PHOTOSYNTHETIC PHOTON FLUX DENSITY FOR AGRICULTURAL ECOSYSTEM
PPFD PAR Solar radiation PAR fraction Quantum-to-energy ratio Diffuse ratio Clearness index Sky conditions
2018/5/16
Photosynthetic photon flux density (PPFD: μmol m−2 s−1) is indispensable for plant physiology processes in photosynthesis. However, PPFD is seldom measured, so that PPFD ...
SIMULATIONS OF THEORETICAL ECOSYSTEM GROWTH MODEL (TEGM) DURING VARIOUS CLIMATE CONDITIONS
climate modelling ecosystem climate change theoretical ecological model
2010/3/26
Climate change has a great impact on the build and the work of natural ecosystems. Disappearance of some population or growth of the number in some species can be already caused by little change in te...
Effects of land use changes on values of ecosystem functions on coastal plain of South Hangzhou Bay Bank, China
Land use change ecosystem functions economic value coastal plain of south Hangzhou bay bank
2010/9/10
Land serves as carrier of various terrestrial ecosystems. The variation of ecosystem functions and its economic value composition are mainly caused by land use and land cover changes. Based on dynamic...
Energy Budget Over Semi-Arid Agro-Ecosystem Using Satellite Data
Wheat Semi-arid ET NDVI LAS MODIS
2016/4/8
Energy-water-carbon cycle is the central theme of biosphere-atmosphere interaction to understand the response and feedback processes in a climate system. The crop response in a semi-arid climate is fr...
Increasing Trend in Net Carbon Fixation by Indian Agro-Ecosystem Estimated Using NOAA — AVHRR Based Glopem Model
Remote Sensing Net Primary Productivity Agro-ecosystem Carbon Fixation
2016/4/8
The monitoring of terrestrial carbon dynamics is important in studies related with global climate change. This paper reports the interannual variability of Net Primary Productivity (NPP) from 1981-200...
The Millennium Ecosystem Assessment：Tradeoffs between Food Security and the Environment
Ecosystem services food security tradeoffs Millennium Ecosystem Assessment
2009/1/8
This paper provides an overview of selected trends and conditions of ecosystem services, in particular, food production and impacts on the environment based on the Millennium Ecosystem Assessment. It ...
Efficient soil solarization for weed control in the rain-fed upland rice ecosystem
solarization LDPE film rice weed control herbicide
2008/12/2
Weed competition causes significant damage (up to 90%) to crop yields. Weed control through chemical means in the form of herbicide is commonly used to kill weeds or inhibit their growth throughout t...
Impact of Organics and P Solublilizing Micro Organisms on Phosphatic Fertilizers under Wetland Ecosystem
Phosphorus dissolution P solubilising microorganisms organic manure
2010/11/10
Field experiments were conducted at Tamil Nadu Agricultural University, Coimbatore during
June - September and October - December 2006 to compare the efficiency of water soluble fertilizer i.e. Singl...