| This article adopts the method of field experiment, in the south of anhui some representative torreya grandis forest has carried on the different types of fertilizer and fertilizer, the contrast test and and the following day in the different fertilizer treatments and contrast the new shoots of a tree and the quantity of strong determination of the orientation and the characteristics of photosynthetic, fluorescence, on the basis of analyzing and comparing different fat class and fertilizer rate affects the quantity of torreya grandis forest vegetative growth and strong differences and relations with photosynthesis, provide theoretical basis for establishing a high quality of torreya grandis forest.The results show that:1. The four seasons, different fertilizer treatments after compared with control group, the daily average net photosynthetic rate increased, and Ⅰ-Ⅲ class tree daily average net photosynthetic rate were as follows:summer> spring> autumn> winter. This is because the spring temperature is appropriate, high air humidity, leaf physiological metabolism, it grows fast, and the summer temperature is too high, air relative humidity is too low, frustrating torreya grandis leaf; Autumn solar-thermal conditions and want to but the humidity is lower than the spring, spring leaf physiological activity affected; Winter, low temperature, photosynthetic active radiation is low, the weakest photosynthesis, plants itself in late growth, make the winter average net photosynthetic rate, ratio of spring, summer, autumn three season are low.2. Four seasons, Ⅰ-Ⅲ class tree with the increase of fertilizer rate Fo, Fm, Fm Fv values have declined, Fm/F0, Fv/F0, Fv/Fm, Np; Q value is relatively stable, with the increase of fertilizer rate has no obvious change. Fertilizer, same Ⅰ-Ⅲ class tree Fo value the overall performance for the winter> spring> autumn> summer; In the same season, F0 value is shown as Ⅲ>Ⅱ>Ⅰ kind of tree. The same season, Ⅰ-Ⅲ class tree Fv/Fm close; Compared four seasons, Ⅰ-Ⅲ class tree Fv/Fm were similar to the spring and autumn, summer and winter, the spring and autumn period and the two season is higher than the duty summer season. The same season, Ⅰ-Ⅲ class tree NP; Q value. Four seasons, spring and autumn, summer and winter, the spring and autumn period and the two season is lower than the duty summer season.3. Rapeseed cake fertilizer on fertilizer was the growth of new shoots did not have a significant impact, and compound fertilizer (x) with the new shoots (y) relations is in line with y= ax2+bx+c model (including a negative, R2= 0.9746～0.9909****), namely the new shoots with the increase of compound fertilizer, the change rule of increased slightly after the first drop shows that excessive use of compound fertilizer can inhibiting effect on the growth of new tips.4. Torreya grandis the following new shoots (y) and in those days and the following quantity (y) (x) and rapeseed cake fertilizer fertilizer and compound fertilizer (x) the relationship between all comply with the model (R2= 0.9931～0.9999****), show the following new shoots and that year and the next year is along with the increase of rapeseed cake fertilizer and compound fertilizer unlimited increase, but different tree body new shoots and strong tend to be the maximum amount of both respectively in their corresponding optimal (minimum) fertilizer rate, the bigger the tree, the new shoots the best fertilizer rates and strong tend to be the maximum amount of need.5. Same size and same tree and fertilizer condition, the influence on the growth of rapeseed cake fertilizer on the new tip is less than the compound fertilizer, and on the influence on the growth of the following new tip is greater than the compound fertilizer. Two kinds of fertilizer for the promotion of the solid volume effect, there were no significant differences in the following strong the promoting effects of amount of rapeseed cake fertilizer than compound fertilizer. |
PDF Full Text Request