Studies On The Effect Of Fomula Fertilizaton On Arundinaria Argenteostriata

The effects of 9 kinds of NPK fomula fertilization on the growth and physiological characteristics of Arundinaria argenteostriata were determined, and its photosynthetic characteristics were studied as well. The results are as follows:1. The effects of the first fertilization in February on the shoots and the ground diameter of Arundinaria argenteostriata were not significant, but it had significant effects on developed bamboo amount and developed bamboo rate. The average developed bamboo rate of fertilized Arundinaria argenteostriata was 1.12 times of the control, and treatment 9 was 1.22 times of the control, which was the best one among all treatments. The average height of fertilized Arundinaria argenteostriata had increased by 20.19% in control, and treatment 9 had increased by 30.31% in control. The average leaf area of fertilized Arundinaria argenteostriata had increased by 14.19% in control, and treatment 7 had increased by 21.35% in control. The average biomass of fertilized Arundinaria argenteostriata had increased by 26.21% in control, and treatment 9 had increased by 43.69% in control. The effect sequence was N>P>K, and the treatment of N3P2K2 was the best one, that is, Urea(391.30 kg/hm~2), SSP(500kg/hm~2), Potassium chloride(75kg/hm~2).2. The chlorophyll content had increased after fertilization, except for treatment 2, and net photosynthetic rate had all increased too, after fertilization. The effect sequence on chlorophyll content and net photosynthetic rate was N>P>K.The crude protein content, crude fat content and carbohydrate content had all increased after fertilization.The effect sequence on crude protein content and crude fat content was N>P>K, but on carbohydrate content was K>N>P. The results showed that fertilization could enhance physical activity and improve nutritional quality of Arundinaria argenteostriata.3. The net photosynthetic rate daily change of Arundinaria argenteostriata was a"double peak"curve, and had obviously"siesta"phenomena. Stomatal conductance was correlated with net photosynthetic rate.The light compensation and the ratio of chl.a to chl.b of Arundinaria argenteostriata were relatively low, this shows its shade-tolerance was relatively good.