| Studies on the nature genetic Pseudosasa amabilis forest in Xiayang and Luofang township basing on the careful observations and systemic trials, the contents are as follow:(1) The growth regulation of scourges and bamboo shoots ;(2) The growth characters of Pseudosasa amabilis;(3) The characters of forest and individual;(4) The biomass of apparatuses and their relativity;(5)The leaf area index and the relativity between it and biomass;(6) Influence on the bamboo growth of different reclaim measures and different density;(7) Influence on the bamboo growth of soil and age;(8) The relativity between the length and weight of bamboo shoots;(9) The content of amini acid>faKdeoxidize suganamylum and fibrin;(10) The holding water ability of down and up ground.The results show that:(l) A majority of scourge of Pseudosasa amabilis generally lie in 10-25 cm soil layer, and there are 1-4 scourges each knot. The rhizome is short and thin. With the increase of age, the scourges and superior scourges are more and they become thicker in colour.(2) The scourge system of Pseudosasa amabilis is complicated and the total length each Mu are 111 892.98 cm. There are 7-8 individual plants each scourge system and 47.80% of them grow on the strong-age scourges. The scourges mainly lie in 0-20 cm under ground and the weight will get to max with the 1 000-1 100 individual plants per Mu in density.(3) In early of July, buds on scourges begain to grow and they stop and become winter bamboo shoots in middle or later of November.Middle and later of next February, they begain to grow again and will become spring bamboo shoots in early of April.There are three stages of bamboo shoots from under to up ground: initialization x flourish and decline and four stages of the growth from shoots to bamboos: initial ization^ rise> flourish and decline.The better modles of heigh growth are yp2 and yp3.(4) Using multifacter analysis and principle components analysis, the results impacting on the stem and whole weight of Pseudosasa amabilis are coincident.The factors impacting on the stem weight are age (x1), thick of stem (x2), chest diameter (x3) and density (xs) and their factor loadings are more than 50%. The whole weight are age (X1)> thick of stem (x2), chest diameter (x3), heigh (x5 )and density (x8) and their factor loadings are more than 60%.Using marginal yield analysis, the theoretical densities of the edible bamboo shoot, stem and bamboo shoot & stem forest are respectively 1 229, 1 512 and 1 197 individual plants per Mu;The best proper chest diameters are respectively 5.73 cm, 6.72 cm and 4.88 cm.(5) There are certain relativities among each aparatus of Pseudosasa amabilis. There are special marked difference among such indexes as chest diameter(D), heigh(H), whole weight stem weight branch weight, the numbers of branches and knots.lt is power function among D, H and stem weight.(6) There are positive relativies between the leaf area index (LAI) and densiry(N), average chest diameter(D) and the numbers of each branch(K).The epuation is LAI=-7.040+0.008N+ 0.346D+0.362K, R=0.8 480.There are positive influence of the age to LAI, and with the age increase, LAI will increase correspondingly in certain degree. It is power function between LAI and biomass and may reach marked difference.(7) The difference of the numbers of bamboo shoots, young bamboos, average chest diameter, heigh and unit stem weight between A and B measure are not obvious in 1999 and 2000.The C measure is better than A and B.There are more product and better economic benefit with 1 020 individual plants per Mu and will be worse with more.(8)There are 18 kinds of amini acid necessary for people, and the total weight may reach 18.2mg/g. Compared with other bamboos, the coarse rotein of Pseudosasa amabilis is most and the content of fat is less slightly. The content of deoxidize sugar and amylum is proper.(9) The holding water ability of the stem is most and the leaf is worst in 1-2 years old. With the age increase the holding water ability of the ste... |
