apricotFFD {spphpr} | R Documentation |
First flowering date records of Prunus armeniaca
Description
The data consist of the first flowering date records of Prunus armeniaca
at the Summer Palace (39{}^{\circ}
54'
38''
N,
116{}^{\circ}
8'
28''
E, 50 m a.s.l.) in Beijing, China
between 1963 and 2010 with the exception of 1969-
1971, and 1997-
2002.
Data source: Chinese Phenological Observation Network (Guo et al., 2015).
Usage
data(apricotFFD)
Details
In the data set, there are two columns of vectors: Year
and Time
.
Year
saves the recording years; and
Time
saves the 1963-
2010 first flowering dates of Prunus armeniaca (in day-of-year).
References
Guo, L., Xu, J., Dai, J., Cheng, J., Wu, H., Luedeling, E. (2015) Statistical identification of chilling
and heat requirements for apricotflower buds in Beijing, China.
Scientia Horticulturae 195, 138-
144. doi:10.1016/j.scienta.2015.09.006
Examples
data(apricotFFD)
attach(apricotFFD)
dev.new()
par1 <- par(family="serif")
par2 <- par(mar=c(5, 5, 2, 2))
par3 <- par(mgp=c(3, 1, 0))
plot( Year, Time, asp = 1, cex.lab = 1.5, cex.axis = 1.5,
xlab = "Year", ylab = "First flowering date (day-of-year)" )
par(par1)
par(par2)
par(par3)
# graphics.off()