Effect Of Fertilizer Combination On Yield And Quality Of Taro

Taro is a kind of corm-vegetable which normally growth in South of China. So far, there have already some researches for the nutrition quality and fertilization of taro at home and abroad. However, so little research for the balanced nutrition management of taro on the condition of acidic soil has been found. For this reason, on the basis of analysing the status of soil nutrition, taking the method of combining field experiment with indoor chemical analysis, by using acidic purple-soil, study the percentage of different combination ,the rule of dynamic variety about trunk, stem and leaf of taro in different growth periods, the effect of absorb utilization and nutrition quality and the economic results of different fertilizer combination, in order to provide theory basis and nutrition management measures to how to improve taro's yield and quality in acidic soil. The result shows:1 different combination has a certain impact on the height of trunk in different growth periods. On the level of low N, spread the same P, the height of taro in different periods could be heightened when spread K. Spread caladium can make taro higher on the condition of high N and high K. The change of part of taro which above ground is also very.2 It is obviously improve taro's biology measure and yield by using different nutrient combination, and it is also happened between taros. Therein to, N₃₀₁₅K₁₀,N₃₀P₁₅K₂₀ and N₃₀P₁₅K₂₀ Ca's yield is higher than others.3 As the process of fertilization changed, influence and diversification are become different by using different nutrient combination. In the metaphase of expand-time, leaves absorb the N as much as 3.38%. The change which absorb P isn't great, but the change of K is great.4 There are different characteristics when taro absorb N in different periods and the rule of variety is also different. In the whole period, the absorbability of P is almost the same except N₃₀P₂₀K₃₀. But when we increase the amount of L, the absorbability could be improved.5 The influence on nutrient absorbability and utilize by using different nutrient combination.In the different growth periods, taro will absorb more K than N, and the P is the last one. When taro absorbs K in different combination, the rule of variety is not the same. On the level of low-N, the amount of absorbing N are much higher than others by using N₂₀P₁₅K₃₀, but on the level of high-N, the N₃₀P₁₅K₃₀ is higher.6 The influence on quality of different growth periods by using different nutrient combination.