The equation of yield trend during the different periods has been calculated, using the yearclimatic data and rice yield by analogue of orthogonal polynomials. early rice y (x) = 157.8 + 14.4xlate rice y (x) = 252.2 + 7.6xThe difference between the real yield and trend yield is the climatic yield :Y't = Yt- Y (x)Climatic analysis of the harvest condition in the rice yield.
本文用中山县历年气候资料和水稻产量,采用正交多项式进行摸拟,求得产量时间趋势方程式: 早稻y(X)=157.8+14.4x 晚稻y(x)=252.2+7.6x 气候产量y’t是实际产量yt与趋势产量y(x)之差,即y’t=yt-y(X)。
In the recent fifty years, there were obviously 3 year periods for the short-term climatic yield, and 8~9 year and 16~17 year periods for long-term climatic yield in Gansu province.
近50a来,甘肃省短期 气候产量具有明显的3a周期,长期 气候产量有明显的8～9a、16～17a的周期。
The climatic yield of peanut in Putian,Jinzhen and Tongan Counties,Fujian Province was studied to predict the harvest in 1995～2000 using regressional analysis.
Based on an analysis of ecoclimatic applicability for millet, the climatic yield model was established in different climatic region.
Based on the yield data of summer crops of the counties in Gansu province, the variation features of the climatic yield of summer crops in spatial and temporal distribution have been analyzed by using R and Q type factorial analysis after calculating the series of the climatic yield of summer crops of the counties.
根据甘肃省夏粮主产县产量资料 ,计算出各县夏粮 气候产量序列后 ,使用R型和Q型因子分析方法 ,分析甘肃省夏粮 气候产量在区域分布及时间趋势上的变化特征。
In the paper, used Miami model to estimate climate yield of plant in every regions of loess plateau. Because water is not enough, light utilization ratio is only 0-1 to 0-2%, the real climate yield of grain per year is 371-9111-0 kg/a, one of timble is 0-890.26 m3/a, and they are decreased by degree from southeast to northwest.
本文应用Miami模型估算了黄土高原各地区的植物 气候产量,由于水分不足,光能利用率只有0.1—0.2％,每年实际谷物 气候产量371.9—111.0kg/a,木材为0.89—0.26m~3/a,都是从东南逐渐向西北递减。
If it is desired to reach the maximum climate yield, it need to be replenish moisture about 41%, equaling to 326-1 mm, it increase production to 6070%.
A Preliminary Study on the Establishment of the Forest Tree Climate Yield Information System
The forest tree climate yield information system preparation is conceived according to the software engineering ideology.
The wheat climate yield had the same phase with precipitation in May in 8-year period and 16-year period clearly,and had the adverse phase with mean temperature in May in 8-year period.
The climate changes affect the climate output of winter wheat with a remarkable periodicity.
The result shows that runoff drought index and spring wheat climate output of Hexi irrigational area appears opposite variation tendency.
The result shows that runoff drought index and spring wheat climate output of Hexi irrigational area present opposite variation tendency of phase.
The wave periods of wheat climate yields and climatic factors were separated and picked up. Correlation of wheat climate yields with climatic factors was also analyzed.
采用常用的墨西哥帽小波(Mex-ican Hat)函数,分别对宁夏中部干旱带和南部山区小麦单产 气候产量和气候要素时间序列进行了小波分析,分离、提取了小麦单产气象产量和气候要素时间序列的波动周期,并进行了相关性分析。
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Grain yield in CS-P3-M2 was 97% of the simulated climatic yield potential, whereas it ranged from 82 to 87% in the M1 treatments.
It is confirmed that, on average, farmers achieve only 60% of the climatic yield potential.
The total grain yield is divided into trend yield, which reflects the influence of economic factors, and climate yield, which reflects the impact of climate factors.
The results of grain and climate yield by EOF (empirical orthogonal function) method show that the grain yield in the eastern China is higher and more fluctuating than that in the western region.
The spatial and temporal distributions of climate yield were divided into four patterns.
The role of soil management is emphasized through comparison of long-term climate/yield data.
The climate output is almost always taken to be global-mean surface temperature but there are other metrics of the climate system that could be used.