scholarly journals PLANT MOISTURE AVAILABILITY ASSESSMENT

2011 ◽  
pp. 20-31
Author(s):  
N. Muromtsev
Keyword(s):  
Narrow Range ◽  
Optimal Level ◽  
Meteorological Conditions ◽  
Functional Dependencies ◽  
Optimal Criterion ◽  
Moisture Supply ◽  
Plant Moisture ◽  
Availability Assessment ◽  
Moisture Potential ◽  
Soil Moisture Potential

The regularities of moisture behavior in the system of surface air - vegetation cover - soil with the use of moisture potential are established. It is shown that the moisture potential in soil, leaves of plants, changes in the moisture potential in the soil-plant system, and relative transpiration is related to functional dependencies. It is well established that each group plants (hygrophytes, mesophytesand xerophytes) is characterized a certain narrow range of soil moisture potential, in which the relative transpiration values do not fall below the optimal level (1.0-0.9). This interval is virtually independent of soil properties and meteorological conditions и can be used as the optimal criterion for plant moisture supply.

Effect of Soil Water Potential Controlling on the Rice Growth

2012 ◽  
Vol 170-173 ◽  
pp. 2407-2413 ◽  
Author(s):  
Wei Chen ◽  
Dao Cai Chi ◽  
En Bo Tai ◽  
Xu Dong Zhang ◽  
Tao Tao Chen
Keyword(s):  
Soil Moisture ◽  
Water Potential ◽  
Soil Water ◽  
Soil Water Potential ◽  
Eating Quality ◽  
Growth Stages ◽  
Maturity Stage ◽  
Initial Stage ◽  
Moisture Potential ◽  
Soil Moisture Potential

Pot experiments were conducted under different status of soil moisture potential during different stages of rice. The results show that soil moisture potential regulation and control is able to increase the rice yield at each growth stages after returning green, the suitable soil water potential criteria for middle-season rice in Liaoning province at different stages is 5~10kPa in tillering initial stage, 35kPa at most in tillering final stage, 5~10kPa in jointing and heading stages, not more than 20kPa in Milk maturity stage; re-watering post drought has a compensation effect to rice whose soil suction potential is controlled in 5~10kPa at tillering initial stage according to the results that its tillers number, output, final root dry biomass and leaf dry weight were significant exceeding contrast; The research on rice quality indicates that water stress in jointing stage increase protein content but reduce eating quality.

scholarly journals MINING RESIDUE IN THE COMMERCIAL LIMESTONE BLENDING AND THE CHEMICAL ATTRIBUTES OF A LATOSOL

2020 ◽  
Vol 28 ◽  
pp. 223-234
Author(s):  
João Vidal de Negreiros Neto ◽  
Rubens Ribeiro da Silva ◽  
Gilson Araujo de Freitas ◽  
Angela Franciely Machado ◽  
Antônio Clementino dos Santos
Keyword(s):  
Soil Moisture ◽  
Soil Acidity ◽  
Mining Activity ◽  
The Third ◽  
Chemical Attributes ◽  
Mining Residues ◽  
Moisture Potential ◽  
Soil Moisture Potential ◽  
Selection Of

The limestone mining activity causes environmental impacts due to the generation of waste. However, the reuse of these residues has been investigated with the objective of improving soil fertility and acidity correction. The objective of this work was to evaluate the potential for using mining residues in the commercial limestone blending and in the chemical attributes of a dystrophic Red Yellow Latosol. The experiment was carried out in three steps: the first corresponded to the sampling and characterization of the residues in the tailings pile; the second was the combination and characterization of the new soil acidity correction agents as well as the selection of treatments based on the Neutralization Power and doses of soil acidity correction agetns (0.0; 0.5; 1.0; 2.0; 4.0 t ha-1); in the third step, a test of the incubation and calibration of the application doses of the soil acidity correction agents was performed. It was found that even with the raise in the levels of Ca2+ and Mg2+ in the correction agents, it was not possible to provide an optimal supply of nutrients to the soil, a fact explained by the low constant solubility of CaCO3 and MgCO3. However, the commercial limestone blending with tailing was efficient, as it had a significant effect on raising the pH and neutralizing the soil moisture potential.

Environmental effects on the short-term response of tropical grasses to nitrogen fertilizer

1975 ◽  
Vol 15 (76) ◽  
pp. 679 ◽  
Author(s):  
GJ Murtagh
Keyword(s):  
Ammonium Nitrate ◽  
Nitrogen Fertilizer ◽  
Dry Matter ◽  
Limited Growth ◽  
Short Term ◽  
Tropical Grasses ◽  
Run Off ◽  
Moisture Supply ◽  
Moisture Potential ◽  
Term Response

The short term response of tropical grasses during spring to ammonium nitrate and urea fertilizers (1 12 kg N ha -1) was measured on kikuyu (Pennisetum clandestinum) at one site, and on setaria (Setaria anceps cv. Kazungula) at two sites. Fertilizers were applied at weekly intervals on 16 occasions at each site during the August-December period. Treatments were assessed in terms of the dry matter response (DMR) and apparent recovery of fertilizer nitrogen (NR), where DMR is the differences in dry matter yield of topdressed plots over the control and NR is the corresponding difference in nitrogen yield expressed as a percentage of the amount of nitrogen applied as fertilizer. These responses were measured at four, and sometimes at eight weeks, and were related to environmental variables by regression analysis. The DMR was more responsive than NR to changes in temperature. Both DMR and NR were very sensitive to changes in soil moisture potential, especially on wet soils, and to changes in effective rainfall (rainfall less run-off). If low temperature limited growth during the first four weeks after topdressing, both DMR and NR increased further when growth during 5-8 weeks extended into warmer periods. However, when moisture supply limited the response at four weeks, the NR remained depressed at eight weeks even with an improved moisture supply. Environmental factors influenced the response more than the type of nitrogen fertilizer and at four weeks, the respective overall DMR and NR from urea were 90 and 86 per cent of those from ammonium nitrate.

scholarly journals PRODUCTIVITY AND QUALITY OF WINTER WHEAT VARIETIES IN THE EASTERN PART OF THE ROSTOV REGION

2018 ◽  
pp. 21-24 ◽  
Author(s):  
A. V. Alabushev ◽  
A. S. Popov ◽  
A. A. Lysenko ◽  
V. A. Yatsenko
Keyword(s):  
Weather Conditions ◽  
Winter Barley ◽  
Wheat Varieties ◽  
Rostov Region ◽  
Moisture Supply ◽  
Cultivation Technology ◽  
Unfavourable Weather ◽  
Plant Moisture ◽  
High Yields

Productivity of winter barley varieties is a main characteristic for their wide introduction into agricultural production. Yields and quality of grain are usually formed under influence of a complex set of conditions. Grain productivity depends on such factors as cultivation technology, hydrothermal regime, tolerance to unfavourable weather conditions. Plant moisture supply is the main factor for obtaining high yields of winter barley in the eastern part of the Rostov region. The study was conducted in the years of 2014-2016, which were characterized with different moisture supply. There were studied the varieties ‘Master’, ‘Tigr’, ‘Timofey’ and ‘Erema’ developed by the FSBSI ARC “Donskoy”. On average three varieties ‘Master’ (4.26 t/ha), ‘Timofey’ (4.18 t/ha) and ‘Erema’ 4.37 t/ha) gave the largest yields for three-year period of study. On average for three-year period of study the greatest quantity of protein was found in the variety ‘Tugr’ (11.7%), the greatest amount of starch was found in the variety ‘Timofey’ (59.2%).

The response of bud morphogenesis in black spruce and white spruce provenances to environmental variables

1979 ◽  
Vol 9 (2) ◽  
pp. 211-217 ◽  
Author(s):  
D. F. W. Pollard ◽  
K. T. Logan
Keyword(s):  
Environmental Variables ◽  
Black Spruce ◽  
Field Trials ◽  
Nutrient Supply ◽  
Treatment Interaction ◽  
Terminal Buds ◽  
Experimental Treatments ◽  
Moisture Potential ◽  
Soil Moisture Potential ◽  
Needle Primordia

Complements of needle primordia were assessed on terminal buds of 1-year spruce (Picea) seedlings formed during experimental treatments of temperature, light intensity, soil moisture potential, and nutrient supply. Several provenances of widely scattered locations were examined in each experiment. While there were strong provenance and treatment effects in most experiments, in no instance was provenance × treatment interaction detected. The results are discussed in relation to genotype × environment interactions reported in field trials.

Soil moisture potential and water content in the unsaturated zone within the arid Ejina Oasis in Northwest China

2004 ◽  
Vol 46 (6-7) ◽  
pp. 831-839 ◽  
Author(s):  
X. Zhou ◽  
L. Wan ◽  
B. Fang ◽  
W. B. Cao ◽  
S. J. Wu ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Water Content ◽  
Unsaturated Zone ◽  
Northwest China ◽  
Ejina Oasis ◽  
Moisture Potential ◽  
Soil Moisture Potential
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