Directs The Yellow Irrigation Ditch Desilting Stack Sand Poplar Tree Planted Shielding Effect Research

This article to directed the yellow desilting stack sand different age of forest poplar tree planted , the different interplanting poplar tree planted growth rule, the shielding effect, the forest crown transpiration characteristic as well as the economic efficiency has conducted the research, has analyzed the poplar tree planted growth rule, the different interplanting to the forest crown transpiration characteristic influence, the poplar tree planted forest different age of forest, the different interplanting prevents the soil wind erosion effect the influence, the poplar tree planted to the temperature effect, the soil hydrology effect, the soil amelioration effect influence, as well as to the poplar tree planted , the interplanting of another crop economic efficiency has carried on the economic efficiency static state, the dynamic analysis. The findings indicated:1. Through the analysis to live the poplar tree planted may know 2a, 4a, 6a, 8a, 10a, the poplar tree planted grows 8a is the time best for cuts. 3a lives the poplar tree pure crop and in the poplar tree planted different interplanting type, the poplar tree pure crop single timber volume quantity is biggest, is 0.0593m3, the poplar tree - peanut, the poplar tree - cotton, the poplar tree - wheat, the poplar tree - forage grass interplanting type single timber volume quantity in turn is 0.051 m3, 0.049 m3, 0.047 m3, 0.045 m3, by the poplar tree - peanut, the poplar tree - cotton interplanting type's standing crop quantity is big.2. The poplar tree planted can reduce in the soil temperature, the wind speed, the air temperature, the air relative humidity, reduced the temperature date to be bad, suppresses the soil surface moisture content massively to evaporate, maintained the soil moisture.3. Through the contrast, May know the different age of forest poplar tree planted 's windproof potency is different, 2a, 4a, 6a, 8a, 10a live the poplar tree planted to be away from the ground 50-200cm place average windproof potency are 27.86%, 34.24%, 42.78%, 47.01%, 51.48%, prevents the soil erosion order is 10a>8a>6a>4a>2a. The different interplanting poplar tree artificial numerous is away from the ground 50-200cm place windproof potency size is in turn the poplar tree - forage grass > the poplar tree - wheat > the poplar tree - cotton > the poplar tree - peanut > the poplar tree pure crop, prevents the soil wind abrasion size order for the poplar tree - forage grass > the poplar tree - wheat > the poplar tree - cotton > the poplar tree - peanut > the poplar tree pure crop.4. The different age of forest poplar tree planted soil level 0-20cm average soil moisture content size is in turn 10a>8a>6a >4a>2a, soil level 20-40cm, 40-60cm, the 60-80cm average soil moisture content size is 2a>4a>6a>8a>10a in turn. The poplar tree planted different interplanting forest land soil level 0-80cm average soil moisture content size is in turn the poplar tree - wheat > the poplar tree - cotton > the poplar tree - peanut > the poplar tree - forage grass > the poplar tree pure crop.5. In 0.05 level to the poplar tree planted different age of forest soil level 0-80cm soil ulmin, the fast-acting nitrogen, the fast-acting phosphorus, the fast-acting potassium and the soil particle size carries on the variance analysis separately, finally demonstrated that between the poplar tree planted different age of forest land soil ulmin, the fast-acting potassium and the soil particle size have the remarkable difference, between the soil fast-acting nitrogen, the fast-acting phosphorus not remarkable difference. In 0.05 level to the poplar tree planted different interplanting forest land soil ulmin, the fast-acting nitrogen, the fast-acting phosphorus, the fast-acting potassium and the soil particle size carries on the variance analysis separately, finally demonstrated that between the poplar tree planted different interplanting soil fast-acting nitrogen, the fast-acting potassium and the soil particle size have the remarkable difference, between the soil ulmin, the fast-acting phosphorus not remarkable difference.6.The poplar tree artificial numerous crown transpiration rate diurnalvariation assumes unimodal, the 6:00 poplar tree leaf blade's transpiration rate is in the morning low, 8:00~14:00 transpiration rate increases rapidly, after 14:00, the transpiration rate reduces rapidly, 18:00 drops to the determination stage the minimum value. The poplar tree artificial numerous crown transpiration process and the photosynthesis effective radiation (PAR), air temperature (T), the air relative humidity (RH%), soil temperature (t), the soil moisture content (%) and so on factors are closely related, affect the poplar tree transpiration rate most remarkable environment factor to photosynthesize the effective radiation to be most prominent, the poplar tree transpiration rate and the air relative humidity (RH%), soil moisture content (%) is an inverse correlation.7. The poplar tree planted different age of forest land looked from the yearly average profit, 8a>10a>6a>4a>2a. Lives the young age time in poplar tree 3a, the farming and forestry compound management economic efficiency by the poplar tree - peanut, the poplar tree - cotton is best, the poplar tree - forage grass, the poplar tree - wheat are good, the poplar tree pure crop benefit is worst.