Research On Water Requirement Rules Of Ligustrum Quihoui Carr Based On Green Quantity

Ander the full understand premise of China’s construction of urbangreen space and the obvious contradiction between the shortage of waterresources, explore the evaluation water requirement rules of green bushesbased on green quantity, for proving reference to develop of systems ofwater saving irrigation of green bushes. In this paper, Based on the northcommon green bushes-Ligustrum quihoui Carr as test materials，madetwo years testing. The results show that：1.Irrigation volume of Ligustrum quihoui Carr was more, the greaterevapo-transpiration amount. In2010, evapo-transpiration in theprocessing of75%-100%FC was the largest and evapo-transpiration inthe processing of35%-45%FC was the smallest. In2011,evapo-transpiration in the processing of35%-45%FC was also smallestand evapo-transpiration in the processing of65%-100%FC was thelargest. Evapo-transpiration minimum, and in with theevapo-transpiration was the largest. Overall, the evapo-transpiration ofindividual processing in2011was higher than that of in2010.2.Growing parameters as evaluation index of green quantity ofLigustrum quihoui Carr：If the plant height as evaluation index of greenquantity, best irrigation water of Ligustrum quihoui Carr should becontrolled between55%-100%FC or65%-75%FC；if crown breadth asevaluation index of green quantity, best irrigation water should be controlled between55%-100%FC or75%-100%FC. The laws of waterof plant height and crown breadth were consistent. Biomass as evaluationindex of green quantity of Ligustrum quihoui Carr：If the Branches dryweight as evaluation index of green quantity, best irrigation water ofLigustrum quihoui Carr should be controlled between75%-100%FC or65%-75%FC；If the Leaf dry weight as the evaluation index of greenquantity of Ligustrum quihoui Carr, best irrigation water should becontrolled in75%-100%FC；If the some shoot dry weight as as theevaluation index of green quantity of Ligustrum quihoui Carr, the bestwater of lobules Ligustrum quihoui Carr should be controlled in75%-100%FC or65%-75%FC. The Branches dry weight, the someshoot dry weight and the Leaf dry weight of Ligustrum quihoui Carr hadthe same law of water, the Maximum biomass in75%-100%FC.3.Best water control zone of total leaf area was in65%-100%FCor55%-100%FC；Best water control zone of average simple leaf areawas in55%-100%FC or45%-100%FC； With the increasedevapo-transpiration amount, regular changes of total leaf area and Simpleleaf area of Ligustrum quihoui Carr were opening down two parabolic. In2011, total leaf area significantly greater than that of in2010, the averagesimple leaf area was less than that of in2010. Under different watertreatment, in2010average leaf length and width of Ligustrum quihouiCarr were more than in2011，Further shows the2010average simpleleaves were bigger than that of2011. The law of water of leaf length, leaf width and average simple leaves area were consistent.4.This study developed a model, and its parameters were speciesspecificity. Model applied in other regions and other species, needs to befurther multi-regional and multi-species test data, calibration and testingof the model parameters. Established leaf area model of Ligustrumquihoui Carr can provide decision support to manage the waterproduction of Ligustrum quihoui Carr.5.If the crown plane structure, cylinder volume, plant size asevaluation index of quantity green of Ligustrum quihoui Carr，best watercontrol zone of Ligustrum quihoui Carr was in75%-100%FC；If theplant body density as evaluation index of quantity green of Ligustrumquihoui Carr，best water control zone of Ligustrum quihoui Carr shouldbe controlled range in35%-45%FC，And the results were consistent withWUE biomass；Branch bulk density should be controlled in35%-55%FC. Lobular privet plant individual crown graphic area was significantlyrelated with features radius and plant volume, plant height has little effecton the crown surface area of the plant volume.6.the trend of biomass WUE (water use efficiency) of Ligustrumquihoui Carr had evapo-transpiration increases with the waterconsumption decreasing. In2010, different evapotranspiration amountsignificant effects on the leaf area, leaf WUE (water use efficiency), ithad less influence for leaf area in2011. The differences of specific leafarea were mainly from the two kinds of water treatment in2010. Leaf water loss rate is decreased with evapo-transpiration increase, the changeto flatten after about24h.7.Under the drip condition, drip head flow choose4L/h or5L/h ofdrip head is better in drip irrigation district. Irrigation water control rangein the415mm-470mm, is better drip irrigation water mode of Ligustrumquihoui Carr.