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From the perspective of agro-meteorological Diversion from Yellow River Water Resources Development

3I on the utilization of research results show that changes in daily water consumption of wheat is roughly: low pre-general tiller before 7.5 ~ l2m] / Im? Of the question, booting with the leaf area index increased temperatures, As the temperature soared to around heading, leaf and plot coefficient maximum. At this time, water consumption of 381,999 at No. 2 Agriculture and Forestry Science and Technology of up to 45 / h or more, then the leaf area decreased. Water consumption is also reduced. Ningxia Meteorological Research Institute under the center of Spring Wheat at the Air Task Force (1997) in the new farm irrigation field experiment Qingtongxia Guangwu information. Establishment of the daily water consumption over time equation: Rc (1) = 0.18 +1.714 X10-l for a 4.93 × 10 a '2 +4 X10 one by one 9253 × 10-0l4 test results show that different Water treatment, although the total amount of water between spring wheat. But the water consumption the same, reflecting the new water irrigation of wheat and climate characteristics of the biological laws. Many experiments show that 3.2 at home and abroad,[link widoczny dla zalogowanych], crop water consumption is not only a function of time. But also with the production levels have a certain relationship. In general, the lower production levels, groups, leaf area index is relatively small, the output and the linear relationship between water consumption,[link widoczny dla zalogowanych], the yield increase with the increase in water consumption; when the population reaches a certain level of leaf area index , with the increase in water consumption, production rose more slowly, or even no increase, such as water consumption continues to increase, but production declined. 3.3 to measure the efficiency of dry land into water, usually a water coefficient, E is water consumption (ke / h.t),, for the production of (l). K values generally increase with the reduced production levels. Test data show that. wheat production levels in 225O a 37501q ~ / l, the Water consumption coefficient between the K value changes in the 900-1500; production levels in 4500-6000, b the time. K value changes between the 700 a g00; production levels when the 6OOO a 7500ke/hzn ~, K value changes in the 500 - between 700. These data, such as converted into water depth Shan, precipitation in dryland agriculture productivity is approximately lmm to produce a grain of 0.5 lkg. that is basically breaking lnma precipitation production of traditional food formula 0.5kg entirely possible. 4, conclusions and recommendations based on previous test results and conclusions of this paper, the above analysis. from further development and rational utilization of water resources in our region, enhance the potential for early starting of agricultural production of wheat, special made the following observations and recommendations. 4.1 our region can not meet without irrigation and dryland spring wheat area of irrigated wheat area also accounted for a considerable proportion too, wheat production in the region has a very important position. while a lot of favorable factors. One of the most important thing is light, heat, rich in resources, part of the region also has irrigation conditions. 4.2 light, heat, water is both an important ecological environmental conditions. is the basis for agricultural production potential. But for the early agricultural region,. water turned light and temperature conditions of limited effect. water scarcity as limited due to tangled decisive increase. Therefore, we should extensively mountainous and hilly areas of afforestation, on slope terraces, plains border irrigation to increase soil water storage capacity of small,[link widoczny dla zalogowanych], it is reasonable to protect and make full use of local water resources. to promote agricultural production in arid areas One of the important measures. 43 full use of natural precipitation, rational use of irrigation quota. inhibit the wheat field evaporation, the struggle with the drought. increased soil available water storage capacity of a save way. Generally speaking,[link widoczny dla zalogowanych], before the rainy season generally, turned deep plowing probe to increase soil exploration activities,[link widoczny dla zalogowanych], do more to accept the rain; the fall rake Mo soil moisture, suppress mentioning entropy, proud to V dared to use the rain, autumn for spring, Water of contradiction. short. Xushuibaoshang traditional measures of effective new method of inhibiting evaporation of combined physical and chemical. form a complete system of resistance to early measures. will greatly enhance our region's new irrigation area of Jan wheat production.
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