| This paper studies applying N, P, K and NPK fertilizer on Songnen Plain on the rhizome, leaf,root element influence, through one year of Continuous Fertilization Experiment reach thefollowing conclusion:1.The seasonal dynamics of Leymus chinensis component density patterns, leaf density andseasonal dynamic of growth in reviving showed multiple peak curve, in the91d Department hasthe minimum value (1573/m~2), September showed a maximum value. Leaf density maximumvalue appeared in the application of P fertilizer treatment group, as (4345/m~2), leaf density size inthe order: P>N>K>CK>NPK, in addition to NPK fertilization treatment group, the remaining3groups compared with the control group the fertilization on growth promoting effect of densitysignificantly (P <0.05).Different fertilization treatment group rhizome length average value of P>N>K>NPK>CK,significantly (P<0.05), fertilization promoting root growth.. N, P, K, NPK5fertilization treatmentgroup of rhizome section average respectively9091.11,10366.67,7820.00,7797.78and5093.33(m~2), the rhizome of segment density and total rhizome length are closely related, the rhizomelength change will restrict the number of roots festival.Annual average growth Ji Ya density in NPK fertilizer treatment group was the highest,6/m~2,shoot density, average size in the order: NPK>K>P>N>CK, applying NPK fertilizer rhizome budgrowth is the most significant (P<0.05), followed by the application of K fertilizer treatmentgroup. The fertilization processing group greater than that of the control group.2. The seasonal dynamics of Leymus chinensis module biomass and density values consistent,leaves from30d to156d growth during the overall trend to increase, to180d ground due toblight and leaf biomass values plummet. And the fertilization treatment group dynamicconsistency, showed a single peak curve, each group of processing biological value and CKtreatment group contrast significantly increased (P <0.05). Leaf biomass of annual average valueswere K>P>N>NPK>CK, the maximum value is100.18g/m~2, CK control group2times, Kfertilization in favor of leaf biomass accumulation, followed by P treatment group and N treatmentgroup. Different groups of rhizome biomass, average value comparison of P>K>N>NPK>CK, themaximum value for the application of P fertilizer treatment group121.04g/m~2, than the CK groupincreased by134.76%, the whole growth period of comprehensive analysis, application of Pfertilizer treatment promote rhizome biomass accumulation, followed by K fertilizer.Total root biomass from68d lower, after root biomass growth is slow, the minimum amountof180d, and N fertilization treatment groups compared, root biomass decreased significantly,NPK fertilization in favor of Leymus chinensis underground biomass accumulation.3. Application of N, P, K, NPK each group of rhizome diameter range were0.77~0.90,1~0.89,1~0.81,1~0.84(cm), while the control group is1to0.71cm. Application of P, K, NPKand control group of rhizome diameter maximum value appeared in the first month after returning,application of P fertilizer maximum value at second months after returning. Application of Pfertilizer treatment group from reviving rhizome diameter began to decline to minimum value,July,8~October, the rhizome diameter did not change significantly, to0.89cm.Fertilization the rhizome of branching angle shows wave type to change in early growth stage,angle is relatively large, to occupy a favorable niche, growth period angle reduces gradually, isbeneficial to plants in nutrient-rich habitats in itself, and the rapid escape unfavorable habitat.4. After fertilization, proline content in leaves was higher than that of the control group of1.3~1.7times, among them, N group of proline content highest. |
PDF Full Text Request