The water requirement was obtained by regression analysis between rainfall and separated climate yield,to evaluate the water complacent extent,Crop yields decreased in stronger El-Nio year and changed with occurring time in weaker El-Nio year.

Based on data of winter wheat yield and climate data of winter wheat region in Hebei province, by using improved separation method of climate yield from actual yield, quantitative analysis were conducted about impacts of climate warming on winter wheat yield.

Then by analysing the relationship between crop climatic yield and precipitation we obtained the water requirement index in different growth durations.

In this paper, based on the climate data(1961-1995) of 63 stations in northern China, and according to the climate analysis about 40 years, the impacts of climate change on the boundary and climatic potential productivity of the interlock area of farming-pastoral region were conducted by using proper boundary indexes and calculating methods.

Characteristics Analysis of the Climate Productivity of Main Forest Types in Heilongjiang Province;

Soil arid and climate productivity over Gansu loess plateau during crop growth period;

The model is revised according to the forage grass climate productivity photosynthesis output and the temperature and the precipitation,and the climate productivity.

Evolvement of climate-productivity over China Loess Plateau;

Evolvement of Climate-productivity over Chinese Loess Plateau;

The opposite evolvement of climate-productivity among sub-districts on Loess Plateau in China;