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Impact of Alternate Drought and FloodingStress on Water Use, and Nitrogen and PhosphorusLosses in a Paddy Field
Alternate drought and fl ooding stress has become more prevalent during paddy growth stages as a result of climate change, especially in southern China. This study aims to assess the effect of
[Regulation effects of irrigation methods and nitrogen application on soil water, nitrate, and wheat growth and development].
Sowing wheat after maize straw returning to the field, replacing FI with micro-sprinkler irrigation four times during the wheat growth period, applying sufficient basal fertilizer and then topdressing at jointing and filling stages, are the high-efficiency and water-saving cultivation strategies of wheat.
[Effects of irrigation time on the growth and water- and fertilizer use efficiencies of winter wheat].
Under the conditions of returning corn straw into soil and sowing when the soil had enough moisture, to properly advance the irrigation time before wintering could make the soil more compacted, promote the tillering and increase the population size before winter, and in combining the increased irrigation at jointing stage could increase the WUE and FUE, realizing water-saving and high efficiency for winter wheat cultivation.
[Effects of irrigation mode on winter wheat yield and water- and nutrient use efficiencies under maize straw returning to field].
The optimal irrigation mode was irrigation at wintering time plus an additional irrigation at jointing stage (900 m3 hm(-2)), which could satisfy the water demand of winter wheat at its mid and later growth stage and increase the WUE of grain, and realize water-saving and high-yielding cultivation.
[Effects of integration of micro-sprinkler irrigation and nitrogen on growth and development of winter wheat and water and fertilizer use efficiency].
Four times of irrigation during the growth period, combined with nitrogen in the jointing and filling phases, were conducive to the accumulation of dry matter during the filling period, increasing the number of grains per spike and 1000-grain weight, thereby increasing yield.
Effect of MCM-41 and SBA-15 Mesoporous Molecular Sieves on Properties of PMMA-Based Composite
Effects of different pore size nano-mesoporous molecular sieves fillers, i. e. MCM-41, SBA-15, together with organic-montmorillonite (OMMT), mixture of OMMT/MCM-41 or OMMT/SBA-15 (m (OMMT): m
[Effects of different tillage methods on phospholipid fatty acids and enzyme activities in calcareous cinnamon soil].
The results showed that soil hydrolase enzymes activities, nutrient contents, microbial diversity varied greatly with the different tillage methods, indicating that fungi was more adaptable than bacteria to an infertile environment.
[Effects of deep plowing time during the fallow period on water storage-consumption characteristics and wheat yield in dry-land soil.]
Under current farming conditions of south Shanxi, the increased grain yield of wheat could be achieved by combining the measures of high wheat stubble and wheat straw covering for holding soil water and deep plowing between the Beginning of Autumn and the Limit of Heat for promoting soil water penetration characteristics to improve the number of stems before winter and spike.