The Influence of the Adjustment of Childbearing Policy on the Potential Growth Rate

2017 ◽  
pp. 137-147
Author(s):  
Cai Fang ◽  
Lu Yang
Keyword(s):  
Growth Rate ◽  
Potential Growth

A Model of Wheat Grain Growth and Its Applications to Different Temperature and Carbon Dioxide Levels

1995 ◽  
Vol 22 (5) ◽  
pp. 843 ◽  
Author(s):  
YP Wang ◽  
RM Gifford
Keyword(s):  
Growth Rate ◽  
Grain Growth ◽  
Temperature Response ◽  
Rate Sensitivity ◽  
Temperature Sensitive ◽  
Potential Growth ◽  
Carbon Supply ◽  
The Difference ◽  
Carbon Dioxide Levels ◽  
Kernel Growth

Kernel growth after anthesis is simulated as a function of the potential kernel growth rate, current photosynthate production and mobilisation of stored reserves. The potential growth rate of the kernel is simulated as two temperature-sensitive processes, cell production and cell growth. The difference between the potential and actual growth rates of the kernel depends on the carbon supply to the free space of the kernel endosperm, while the carbon supply is itself affected by the actual kernel growth rate. Sensitivity analysis showed that the growth rate of the grain per plant is most sensitive to the potential growth rate of the kernel and number of kernels per plant. This model is able to simulate the observed rates of grain growth and leaf senescence from anthesis to physiological maturity for wheat plants grown in two CO2 concentrations. The simulated temperature response of grain growth agrees well with the experimenal observations.

scholarly journals Role of carbon allocation efficiency in the temperature dependence of autotroph growth rates

2018 ◽  
Vol 115 (31) ◽  
pp. E7361-E7368 ◽  
Author(s):  
Bernardo García-Carreras ◽  
Sofía Sal ◽  
Daniel Padfield ◽  
Dimitrios-Georgios Kontopoulos ◽  
Elvire Bestion ◽  
...  
Keyword(s):  
Growth Rate ◽  
Temperature Dependence ◽  
Growth Rates ◽  
Carbon Allocation ◽  
Thermal Sensitivity ◽  
Potential Growth ◽  
Allocation Efficiency ◽  
Population Growth Rates ◽  
Performance Curves

Relating the temperature dependence of photosynthetic biomass production to underlying metabolic rates in autotrophs is crucial for predicting the effects of climatic temperature fluctuations on the carbon balance of ecosystems. We present a mathematical model that links thermal performance curves (TPCs) of photosynthesis, respiration, and carbon allocation efficiency to the exponential growth rate of a population of photosynthetic autotroph cells. Using experiments with the green alga, Chlorella vulgaris, we apply the model to show that the temperature dependence of carbon allocation efficiency is key to understanding responses of growth rates to warming at both ecological and longer-term evolutionary timescales. Finally, we assemble a dataset of multiple terrestrial and aquatic autotroph species to show that the effects of temperature-dependent carbon allocation efficiency on potential growth rate TPCs are expected to be consistent across taxa. In particular, both the thermal sensitivity and the optimal temperature of growth rates are expected to change significantly due to temperature dependence of carbon allocation efficiency alone. Our study provides a foundation for understanding how the temperature dependence of carbon allocation determines how population growth rates respond to temperature.

Choice feeding as a method of determining lamb nutrient requirements and growth potential

1986 ◽  
Vol 1986 ◽  
pp. 72-72
Author(s):  
M. Cropper ◽  
M. Lloyd ◽  
G.C. Emmans ◽  
C.E. Hinks
Keyword(s):  
Growth Rate ◽  
Sugar Beet ◽  
Protein Intake ◽  
Crude Protein ◽  
Growth Potential ◽  
The Other ◽  
Nutrient Requirements ◽  
Potential Growth ◽  
Beet Pulp ◽  
Choice Feeding

The experiment described here was designed to test the proposition that lambs, given access to two feeds, as a choice, one abundant in crude protein (CP), the other deficient, can both select a diet which supports their potential growth rate and which avoids excesses of protein intake.Twenty four Suffolk x Greyface wether and females, at a mean liveweight of 20.2 kg (s.e. 0.6) were individually housed and their feed intake and liveweight recorded weekly.The four pelleted feeds used were highly digestible and had estimated energy yields of 10.5 MJ ME/kg freshweight. The basal feed (A) was made from equal parts barley and sugar beet pulp plus a vitamin/mineral mix. It contained 91 g CP/kg FW. Feed D was made by substituting fishmeal for the barley in feed A such that it contained 383g CP/kg. Feed B contained one third D and two thirds A and contained 182g CP/kg. Féed C contained two thirds D and one third A, giving a CP content of 266g CP/kg. Thus each of the four feeds A, B, C and D could be described in terms of either the proportion of feed A or the crude protein which it contained.Four lambs were offered feed A alone, and four lambs received feed B only. Twelve of the lambs were given ad 1ibitum access to both the basal feed A and one of the three other feeds B, C and D, for ten weeks. Four lambs were offered a choice between feed B and feed D for four weeks.

scholarly journals Branch development in Lupinus angustifolius L. I. Not all branches have the same potential growth rate

1998 ◽  
Vol 49 (320) ◽  
pp. 547-553
Author(s):  
L. C. Miguel ◽  
N. E. Longnecker ◽  
Q. Ma ◽  
L. Osborne ◽  
C. A. Atkins
Keyword(s):  
Growth Rate ◽  
Lupinus Angustifolius ◽  
Potential Growth ◽  
Branch Development

THE MACROECONOMIC EFFECTS OF ENHANCED REFORMS IN CHINA

2019 ◽  
Vol 65 (06) ◽  
pp. 1619-1644
Author(s):  
ZHIHONG JIAN ◽  
YEQING YANG
Keyword(s):  
Economic Growth ◽  
Adverse Effect ◽  
Growth Rate ◽  
Steady State ◽  
Average Intensity ◽  
Potential Growth ◽  
Economic Growth Rate ◽  
Short Run ◽  
Macroeconomic Effects

Motivated by the idea that substantive reforms in China always happen intermittently and randomly, this paper constructs an RBC model, augmented with a shock that reflects the role of reforms and its randomly occurring character, to investigate the macroeconomic effects of enhancing the reform intensity. An increase in the average intensity of reforms leads to a higher economic growth rate permanently and provides sustainable support for economy when the potential growth rate declines. But it decreases the ergodic steady state of the detrended output, and this could have an adverse effect on economic growth in the short run.

Automated wet feeding of weaner pigs versus conventional dry diet feeding -effects on growth rate and feed consumption

1992 ◽  
Vol 1992 ◽  
pp. 136-136
Author(s):  
Partridge G.G. ◽  
Fisher J. ◽  
Gregory H ◽  
Prior S.G
Keyword(s):  
Growth Rate ◽  
Feed Consumption ◽  
Potential Growth ◽  
Beneficial Effects ◽  
Milk Substitute ◽  
Liquid Milk ◽  
Feeding Effects ◽  
Dry Diet ◽  
Ad Libitum Feeding ◽  
Weaner Pigs

Poor feed intake of conventional dry diets in the immediate post-weaning period can be a major factor limiting potential growth rate in the young pig. Feeding systems based on the automatic dispensing of liquid milk -substitute have been developed over the last 10-15 years but they have not achieved widespread usage within the U.K. industry for various reasons. Several studies have shown, however, the potential benefit of offering liquid or slurry diets over this critical period around weaning (eg. English, Maclean and MacPherson 1988; Anon 1991). Deprez et a] (1987) also demonstrated its beneficial effects on the morphology of the small intestine post-weaning. The present study examined the use of an experimental automated feeder (‘Autofeeder’, patent applied for) which could dispense a conventional pelleted starter diet plus water (1:1 ratio) 6, 8, 12 or 24 times throughout the day in varying quantities. It was compared against a conventional dry hopper (control) with ad libitum feeding.

Estimating South Africa's Output Gap and Potential Growth Rate

2017 ◽  
Vol 85 (2) ◽  
pp. 161-177 ◽  
Author(s):  
Johannes W. Fedderke ◽  
Daniel K. Mengisteab
Keyword(s):  
Growth Rate ◽  
Output Gap ◽  
Potential Growth
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