Advances in effects of NPK application rates on yield and quality of cassava
Cassava is the world’s fifth major crops. NPK application rates influence growth potential growth strength, yield and quality of cassava. This paper reviews studies that the effects of NPK application rates on the growth potential, yield and root quality of the cassava plant and its related research. The conclusions are as follows:(1)the importance of NPK is in the order of N>K2O>P2O5. (2) the cassava get its best growth potential when the NPK application rates are 150~200 kg/hm2 (N), 50~120 (P2O5) kg/hm2 and 150 kg/hm2 (K2O), respectively. (3)Effects of N and K application rates on yield show a quadratic equation. Effect of P application rate on yield shows a linear plus platform equation or quadratic equation. (4)When the N, K rates are at the middle or low level, the dry matter content and starch content increase slightly with the increase of P rate. When N, P rates are at the low level, the dry matter content and starch content are in proportion to K rates. When P, K rates are at a low level, the N rate has little effect on dry matter content and starch content. (5) Currently the study on the relationship between nitrogen levels and quality of cassava roots is insufficient.
NETL
NSTL
万方数据
维普
