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Chlorophyll fluorescence (CF) is a direct indicator of plant physiology and reflects the photochemical process and its efficiency. CF is difficult to quantify because it is included in the reflected light. In the present study, the interrelationships between chlorophyll fluorescence parameters and spectral reflectance measured in the first, second, third and fourth leaves from the top of plant from...
Aimed at resolving the unreasonable disposition and disadvantage to environment of poultry manures, the research on the effect of different chicken manure rates on crop yields and the soil nutrients accumulation were carried out by a field plot experiment. The results showed that a appropriate application rate of chicken manure significantly increased the yield of wheat. No obvious differences of...
Through 3 experiments, the high-effective technology for wheat production in dry-land had been studied. The first experiment was about the condition of soil nutrient and water content in irrigated and dry-land wheat of high yield; the second experiment was about the changes of dry weight of root system after anthesis and yield in different soil thickness in dry land wheat by using soil column, and...
Wheat is one of the most important crops in the world. So the safety of wheat product is essential to people's health. With imitating experiment of arsenic polluted soil in pots, effects of nitrogen and phosphorus fertilizers on yield and quality characters of wheat were studied, and arsenic contents of wheat root, stem, grain and soil were determined detailedly. The effective measures by adding nitrogen...
AGFACE facilities are being used to investigate the interactive effects of CO2, temperature, water supply and nitrogen on wheat growth, yield and quality. One of the engineering goals of AGFACE was to describe the extent of spatial variation of CO2 concentrations [CO2] inside AGFACE rings and factors affecting it. Monitoring has shown that [CO2] is highly variable near the ring-edge where CO2 is emitted...
Cereal laminae differ in dimension and shape in relation to their position on the stem and according to environmental conditions. Distinct responses of species and varieties are also expected. However, there is little quantitative data available. Here we present a framework to analyze lamina shape using a simple empirical model, which has five parameters. We demonstrate that the model is flexible...
A study was conducted to assess the effect of long-term fertilization on soil fertility, crop production and soil CO2 and N2O fluxes. The experiment was initiated in 1990 at the Yucheng Comprehensive Experiment Station located at the North China Plain. Five treatments comprising no fertilizer (0), NK, NP, PK and NPK were included. The yield effects of the chemical fertilizers were in the order of...
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