The results showed, in the growing seasons, the soil evaporation of the forest with (1.5) m×6 m, 1.5 m×3 m were 123.1 mm and 134.24 mm, the forest transpiration of two densities were 76.62 mm and 62.33 mm, their water consumption were 199.77 mm and 196.54 mm respectively under the water content without irrigation.
The results showed that the water consumption under film mulch treatment was 460.1 mm and decreased about 310.3 mm than the control,but the yield increased 1363.69 kg/hm~(2),the income increased 1817.1 yuan/hm~(2),and the water use efficiency(WUE) increased(6.0) kg/(mm·hm~2).
The mulching technique can increase 2.7%~89.0% of water utilization rate; decrease 2.5%~12.7% of water consumption and 2.5%~35.0% of water consumption strength in maize production.
On the basis of soaking test on site, the paper introduces the law of susceptibitity of collapse is changed with depth, The relation of in flucence range of collapse with loessic depth, optional type of pit, time of presoak treatment and methods of estimating quantity of water consumption are also presented. The results of testing and analyzing can be used to design of presoak treatment.
The quantity of water consumption of apple trees in various growth stages under irrigation condition were obtained through pit test according to the principle of water quantity balance.
(2) in all growth period,compared with pipe-irrigation,the micro-sprinkle irrigation and drip irrigation saved water by 31.99% and 49.83%,respectively,decreased the water consumption amount by 12.49% and 11.52%,respectively;
The water conusmption amount of millet increase with the yield's raising,for example,water consumption were 254 mm with yield 115kg per mu and 301mm with 233kg,among which water consumption amount took 10% at the seedling stage,21% at the stooling stage,35% at the shooting period and 34% at the heading period;
The yield of drip irrigation was 204.15 kg/hm~2 higher than that traditional irrigation,the amount of water consumption was reduced by 32.91 mm,and the water use efficiency was increased by 0.73 kg/(mm·hm~2).
Water consumption through tree transpiration,which accounted for 34.7%-71.4% of the precipitation and 60.8%-71.7% of the total amount of water consumption in the same period,was the principal way of water loss and the main factor inducing water deficiency.
There was a close quadratic relationship between total yield and total amount of water consumption. The highest yield of 83 028 kg/hm~2 was obtained under optimal irrigation amount of 399.8 mm.
4. The amount of water consumption of S.viciifolia through evaporation and transpiration is 523-590mm, the depth of water consumption is about 2.5m, which is closer to Caraganar's.
adopts ABR-Oxidation ditch process to treat the wastewater from papermaking, gets rid of the organic pollution in the wastewater effectively, and treated water quality meets the retrieval and utilization requirements; the amount of water consumption reduces to 1.2～1.4m3/t paper; the enterprise has succeeded in realizing zero discharge.
Single tree's sapwood scattering style and diurnal water consumption rhythm for different diameter classes were studied in a 48-year-old Quercus variabilis stand, water protection forest in Beijing.
Daily water consumption of different diameter classes in September ascended steeply in the early morning and reached the peak around 11:00, and then descended slowly to the valley at 18:00.
耗水量
water consumption
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