A Study On Simulating Approach For Water Requirement Of Grass And On Irrigation Schedule Of Grass Planted By Man In The Otinday Sandy Area

The ecology construction for the Otinday Sandy area not only need to understand water requirement of grass planted by man and it's irrigation scheduling but also understand water requirement of community of natural grass in different hydrology years and in different growth seasons of same hydrology year due to that the water requirements determine the growing situation of natural grass. The basic research of them are helpful safety ecology construction and protecting against natural calamities to animal husbandry. This study have determined the water requirements of man planted grass and natural grass in term of two rears experimental study for determining water requirement of two types of grass which have been finished for the key project of NFCNR named by'scientific allocation water resources for ecology construction in the region between Beijing and Inner Mongolia('50139040). The high efficient irrigation schedule and non–sufficient irrigating schedule have been determined .Main achievements of this study are:(1)The stomatal condctance response model and the stomatal conductance- the mechanism of photosynthesis model have been set up and use them to study the approach by which transform stomatal conductance of leaves to canopy conductance.(2)Water requirement of grass planted by man have been determined by The Dual Crop Coefficient Method ,The Energy Balance Model, The Coupling Model of Photosynthesis and Transpiration and SWAP Model and the using condition of those model also been discussed here.(3)Non–sufficient irrigating schedule and The high efficient irrigation schedule of grass planted by man have been determined by Multi-stage stochastic discrete dynamic programming model and water balance model respectively.Innovation points in this study are:(1)The four types of multiplication model of Jarvis P G which consider the response relationship between the stomatal conductance and environment factors such as leaf temperature ,vapor pressure deficit, CO₂ concentration photo-synthetically active radiation...