| The Li6(45) orthogonal experiment design was undertaken in this test, for probing into the impact of urea, calcium magnesium phosphaten and zeolite applying in different combinations to the amount of bamboo shoots, growth characteristics, aboveground biomass and nutrients of new bamboos of karst hill slope land bamboo wood forest (Dendrocalamus latiflorus) of mashan county in guangxi, at the same time we analysed the effect and economic benefit of different fertilizer treatment. The purpose is looking for the best combinations ratio of fertilizer to providing scientific basis for rational application, promoting high and stable yield of bamboo in rock mountain area, cultivating efficient bamboo shoots and wood forest, promoting bamboo forest efficiency and sustainable managementment and the farmers’income in hill area. The results of the study show that:1. Fertilization can raise the amount of bamboo shoots.The amount of bamboo shoots was higher of fertilizer than no fertilizer. The highest a bamboo shoot mount was0.62per mother bamboo. In addition to zeolite, urea, calcium magnesium phosphaten and the interaction of the three fertilizer had very significant influence on the amount of bamboo shoots out. All fertilizer reaced the best effect with the highest level, and the amount of bamboo shoots out increased with fertilizing amount of urea.2. Fertilization has certain influence on growth of new bamboo.Three fertilizer and their interaction had very significant effect to new bamboo’s height growth, while had no significant effect to the internode length of1.3m high. The levels of urea had no significant influence to diameter at breast height (DBH) and diameter at ground. The influence of zeolite to DBH was very significant, while it was remarkable difference to the diameter at ground. Levels of calcium magnesium phosphaten and the interaction of three fertilizer were all very significant at influence on diameter at breast height and the ground diameter. The levels of urea were not significant to the thickness at2.0m height of new bamboo, while levels of calcium magnesium phosphaten and zeolite and interactions of three fertilizer were all very significant. The new bamboo’s height, DBH, ground diameter, internode length of fertilizer processing are better than no fertilizer processing, and height had increased trend with increasing surueyed of urea and calcium magnesium phosphaten.3. Fertilization significantly increased the puground biomass of new bamboo.The three fertilizer all had significant influence to dry part of new bamboo culm, branch, leaves biomass and the total aboveground biomass (dry weight). The NO.6processing had the highest biomass in different organs and total (with stem, branches, leaves and the total biomass aboveground respectively10.668t/hm2,2.532t/hm2,1.103t/hm2,14.304t/hm2), and then the NO.4processing (with stem, branches, leaves and the total biomass aboveground respectively9.384t/hm2,2.521t/hm2,1.008t/hm2,12.913t/hm2), and no fertilizer processing (processing1) was lowest in units biomass of stem, branches and the total aboveground biomass (respectively with1.416t/hm,0.138t/hm,1.767t/hm2). Fertilizing amount of three fertilizer were differently to effects on stem, branch and leaf biomass.4. There kinds of fertilizer and fertilizing amount had different effects on new bamboo’s nutrient content in stem, branch and leaf.There kinds of fertilizer and their interaction had a significant effect to nutrient content of stem, branch and leaf. There fertilizer and their interaction had very significant influence in N, P, K, Ca, Mg content of bamboo culm, and only calcium magnesium phosphaten had significant influence to SiO2content. The levels of urea had significant influence to new bamboo’s branch N content, while very significant to branch P, K, Ca, Mg and SiO2content; levels of calcium magnesium phosphaten was not significant effect to branch N content, while very significant to branch P, K, Ca, Mg content, and significant to branch SiO2content; zeolite was very significant to content of each element in branch; the interaction of there fertilizer had no significant to branch N content and very significant to other element content. Levels of there fertilizer and their interaction had very significant efects to element content of new bamboo’s leaves.5. Fertilization effects to nutrient cumulant of new bamboo per plantThe6nutrient of aboveground organs, N, P, K, Mg, SiO2mainly accumulated in stem, and of nearly accumulation in sticks and leaves; Ca mainly accumulation in bamboo leaves. The levels of urea significantly influenced on bamboo culm SiO2accumulation, and the there fertilizer and their interaction had very significant influence on accumulation of N, P, K, Ca, Mg in bamboo culm per plant, each nutrient cumulant of new bamboo’s branch and leaves per plant.6. The relationship between new bamboo’s culm, branch, leaves nutrient elements cumulant per plant and growth and biomass per plant extremely strong.Each nutrient cumulant of bamboo culm, branch, leaves per plant and biomass of bamboo culm, branch and leaves the total biomass per plant had very significant positive correlation. And each nutrient cumulant per plant in bamboo culm and branch and nitrogen, phosphorus and potassium in reserves leaf and basically achieve significant correlation level with growth index of new bamboo, especially with height, DBH, ground diameter and wall thickness bamboo a very significant positive correlation. Internode lenght were weakly related to nutrient reserves in each organs. The results indicated that the nutrient reserves in organs of new bamboo had strong relevance and effect on growth and biomass.We get the regression equation of bamboo leaves nutrient content and stem biomass per plant was:Y1=-968.33-47.31X1+194.36X3+85.22X6-107.93X22-17.37X32-0.98X42-10.41X52-1.72X62+7.48X1X3+8.21X,X5+43.06X2X3+27.15X2X5+7.03X2X6+3.81X3X4-10.81X3X5-9.91X3X6The regression equation of bamboo leaves nutrient content and total biomass per plant was:Y4=-97.17-58.45X1+96.83X3+3.66X4+12.12X6-106.89X22-18.98X32-17.27X52+7.58X1X3+11.76X1X5+60.88X2X3+46.45X2X5-13.96X3X5-3.92X3X6The two regression equations were highly significant, and degree of fitting was good, could be used as a model of using nutrient content to predicte the biomass.7. Value of fertilizing processings was higher than no fertilizer processings, most of processings gained significant.The NO.6processings achieved the highest fresh bamboo yield, with1357.1kg/667m2, and with the value of542.9yuan/667m2; secondly was NO.4processings (yield1334.6kg/667m2), and with the value of533.8yuan/667m2. The no fertilizer processing had the lowest yield of159.0kg/667m2, value of63.6yuan/667m2(processing1). The highest profit was491.5yuan/667m2(processing6) of regardless the expenses on fertilization labor, while the highest profit was471.7yuan/667m2(processing6) of plan the expenses on fertilization labor.In summary, fertilization on Dendrocalamus latiflorus bamboo wood forest had good stimulative effect to bamboo shoots out, growth of new bamboos, bamboo biomass and economic benefit. Comprehensive fertilizer effect to growth and income gain, the appropriate fertilizer combination could be urea500g+calcium magnesium phosphaten1000g+zeolite5000g. |
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