Refining foliar diagnosis of potassium status of sugar cane - defining site - specific optimum leaf potassium levels
| MSI01P3539 | |
| Ng Kee Kwong, K. F. Chong Shin Sen, P. | |
| Refining foliar diagnosis of potassium status of sugar cane - defining site - specific optimum leaf potassium levels | |
| Periodical article | |
| 2000 | |
| Revue agric. sucr. Ile Maurice | |
| 79 (1): 36-41 | |
| En | |
| En Fr | |
| As sugar cane response to potassium (K) fertilization is influenced by environmental factors such as moisture, a single optimum leaf K concentration cannot be valid for all locations in Mauritius. Consequently, the optimum leaf K concentration specific to the main soil families in eachfactory area has been established by the boundary line approach using the yield and leaf K data sets collected since 1989 from the permanent sampling units (PSUs). The results obtained showed that the location-specific optimum leaf K concentration covered the narrow range of 1.00 to 1.30 K per cent d.m., with most of the values being restricted between 1.10 to 1.30 K per cent d.m. In view of the variability introduced during field sampling of the leaves, and during laboratory analysis together with the uncertainty caused by the irregular variation of leaf K concentration with age of sugar cane, a single optimum leaf K level of 1.20 percent d. m. can continue to be used fot the diagnosis of K status of sugar cane in Mauritius except in the M2, T3/T4, L4 soil families as well as in the P1 soils of Medine factory area and in P2 soils of Mon Tresor factory area. In these soil families an optimum leaf K concentration of 1.00 per cent d.m. will more accurately reflect the K status of sugar cane thereby avoiding overfertilization with K fertilizers. | |
| Sugarcane Foliar diagnosis Potassium Optimum level Plant nutrition | |
| Mauritius | |
| Sugarcane: Soils and Plant nutrition | |
| Techniques: Foliar diagnosis | |
| 2001-02-15 | |
| En | |
| LIB | |
| CAT | |
| CHEm |