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Ours is a severe shortage of water resources in the country, but a long time, due to the lack of systematic understanding within the plant's water consumption law, existing water management there is a great blindness, extensive management level, resulting in an annual forest conservation need to consume a large amount of water resources, resulting in a waste of water resources. Zenia insignis, to select a reasonable planting density, improve water use efficiency as the goal, different density area Sapling of Different Ages potted seedlings and environmental impact factor in long-term positioning observations clarify the winged pod wood temporal and spatial variation of water consumption, reveals a different density areas, the differences in the ability of Zenia insignis water Different Ages, the relational model of forest water main environmental factors, and Scaling. The main results achieved in this study: comparison of different density, water consumption the Different Ages Zenia insignis between the differences. The Sapling trial: transpiration rate of 3 × 3m density areas, 1.5 x 1.5m at second place, 1 × 0.3m at the minimum; highest density areas of water use efficiency of 1.5 × 1.5m × 0.3m at second place, 3 × 3m at minimum. Pot experiment: daily water consumption in the Health seedlings is greater than to stay in bed seedlings, water use efficiency to stay bed seedlings than when seedlings. Analysis of the impact of environmental factors on potted seedlings water consumption by transpiration under Adequate Water Supply, each seedling transpiration rate and stomatal conductance and solar radiation is significantly correlated with the relative humidity, temperature correlation was slightly weaker. Different months seedlings daily water consumption difference is significant, sufficient water conditions in June, when the seedlings gt; August gt; November gt; 10 months stay in bed seedlings August gt; June gt; November gt; months; under controlled water conditions, when the seedlings and stay in bed seedlings are June gt; August gt; November gt; October. 5 optimization model, young forest and potted seedlings transpiration rate and environmental factors. Determine the field of the test soil moisture content based on the physiological and physical characteristics of the seedlings under different moisture gradient, when the seedlings as 17.12 percent the the (water 0.265Mpa), stay in bed seedlings 22.30% the (water 0.096Mpa), moisture effectiveness of critical value when seedlings seedlings of 14.80% the (water 0.331Mpa), stay in bed seedlings was 16.79% the (water 0.325Mpa) the the drought critical value when seedlings of 8.39% the (water 0.449Mpa), stay in bed 10.41% the (water 1.343Mpa), permanent wilting coefficient when seedlings 7.83% the (water 0.456Mpa), stay in bed seedlings 5.95% the (water 3.619Mpa). Accordingly, the level of soil moisture supply is divided into three levels, namely adequate moisture, mild water shortage, moderate water shortage. In the six months of observation trials using Li-6400 portable photosynthesis system, the SEC the WAN pressure membrane and other advanced equipment. 3-5 replicates a pilot project designed and carried out for a long time, the multi-period observations. The topics selected Zenia insignis study, and for the first time water consumption characteristics of different density, Zenia insignis Different Ages, the choice of forest water and planting density, moisture reasonable irrigation combination, and therefore in the research object choice, the study of the combination of systematic and Theory and Production Practice has novelty.
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