Investigations on the nutrition of black pepper (Piper nigrum L.)
| dc.contributor.advisor | Sivaraman Nair, P C | |
| dc.contributor.author | Nybe, E V | |
| dc.contributor.author | KAU | |
| dc.date.accessioned | 2018-12-03T04:56:43Z | |
| dc.date.available | 2018-12-03T04:56:43Z | |
| dc.date.issued | 1986 | |
| dc.description.abstract | Detailed studies were conducted in black pepper (var. Panniyur 1) from 1981 to 1985 at the Pepper Research Station, Panniyur and College of Horticulture, Vellanikkara with a view to induce nutrient deficiency symptoms by sand culture and to find out the relationships of foliar nutrients with yield. Deficiency symptoms of macro-nutrients except Ca and S were first manifested on the older leaves while that of micro-nutrients on younger leaves. Symptoms of N deficiency were expressed as uniform yellowing followed by necrosis whereas purple to bronze yellowing with ash coloured necrotic areas were the symptoms of P deficiency. Potassium deficiency symptom was characterized by tip and marginal necrosis which later progressed to the two-thirds distal portion of the lamina. Calcium deficiency symptoms appeared as tiny brown necrotic spots on chlorotic area near margins which later enlarged to form black necrotic areas. Visible symptom of Mg deficiency was oval interveinal chlorotic area followed by black necrotic patches. Sulphur deficiency was manifested as uniform yellowing with brown necrotic spots. There was profound reduction in vegetative growth due to deficiency of macronutrients. The reduction in shoot growth and leaf area index was maximum in the case of deficiency of N (56 and 63% respectively) followed by S (48 and 17% respectively). The reduction in root growth was quite high due to deficiency of Ca (61%), P (45%) and N (39%). Interveinal chlorosis was the initial symptom of deficiency of all micro- nutrients. However, the symptoms were specific to the concerned nutrients. Iron chlorosis was characterized by the presence of green bands along the major veins whereas bronze yellow colour of the interveinal areas was the specific symptom of Mn deficiency. Bronze colour of the entire lamina with necrotic tips and margins were the symptoms of Cu deficiency. Zinc deficiency was unique with little leaf and rosetting. Due to B deficiency, the leaves became large, thick and brittle with orange yellow mottles on upper surface and grey brown interveinal patches on lower surface. Unlike macronutrients, there was no marked reduction in vegetative growth due to deficiency of micro-nutrients except Fe and B which recorded 35 and 22 per cent reduction respectively, in total dry matter production. Boron deficient plants registered 18 per cent increase in leaf area index. The growth of the vine was completely arrested at comparatively early stage (4.5 months after treatment) due to S deficiency followed by N (6th month), Fe (7th month), B (12th month), P (13th month) and Cu (14.5 months after treatment). There was no cessation of growth in the case of deficiencies of other nutrients. Visual symptoms of deficiencies were concurred with a marked reduction in the foliar levels of the concerned elements. Antagonistic effects among K, Ca and Mg were also observed. In all other cases, deficiency of one element failed to influence the foliar level of others. The deficiency symptoms could be recovered by the application of the deficient nutrient element which provided valid information for the confirmation of the deficiency symptoms. The foliar levels of macro-nutrients except Ca registered two peaks, one in June and the other in October while the lowest level was during April. The nutrients namely Ca, Fe, Mn and Zn, in general showed a decreasing trend from April to June and thereafter increased and reached maximum level in December. Highly significant positive correlations were showed by P, K, Ca and Mg with yield. The critical level of S was found to be 0.15%. The ‘tentative critical levels’ suggested for the other elements studied are as follows: N - 2.1 to 2.4% P - 0.19 to 0.20% K - 1.8 to 1.9% Ca- 2.8 to 2.9% Mg - 0.5 to 0.6% Fe - 156 to 169 ppm Mn - 77 to 88 ppm Zn- 30 to 32 ppm The two most important nutrient elements which are highly essential for the production of pepper could be identified as K and P in view of their high direct and indirect effects on yield. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810085079 | |
| dc.keywords | Plantation Crops and Spices | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Department of Plantation Crops and Spices, College of Horticulture, Vellanikkara | en_US |
| dc.sub | Horticulture | en_US |
| dc.subject | null | en_US |
| dc.theme | Nutrition of Black Pepper | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | Investigations on the nutrition of black pepper (Piper nigrum L.) | en_US |
| dc.type | Thesis | en_US |