Nitrogen mineralization in neem cake amended soil and its uptake by wheat
KrishiKosh
View Archive InfoField | Value | |
Title |
Nitrogen mineralization in neem cake amended soil and its uptake by wheat
|
|
Creator |
Saha, Sushanta
|
|
Contributor |
Dahiya, Daljit Singh
|
|
Subject |
Fruits, Planting, Biological phenomena, Crop management, Farm inputs, Economics, Productivity, Markets, Sampling, Land resources
|
|
Description |
The effect of different proportions of neem cake on urea hydrolysis and N-transformation in soils was studied in the laboratory. The findings of the study revealed that the amount of unhydrolysed urea decreased with the increase of incubation period from 3 h to 24 h sampling in all the soils. However, at a particular incubation period the hydrolysis of urea decreased markedly with increasing proportions of neem cake treated with the soil. The content of NH4 +-N increased upto 1st day of incubation in soils containing treatments from control to 50% N supplied through neem cake and decreased with further increase in incubation period. Similarly, the soil amended with 75% N through neem cake the NH4 +-N increased upto 7 days of incubation and decreased thereafter. On the other hand, the increase in NH4 +-N content was found upto 28 days in soil amended with only neem cake and then decreased with the further increase in incubation periods. The amount of NO3 --N increased with increasing incubation period in all the soils. The NO3 --N content decreased significantly at each incubation period as the proportions of N through neem cake increases from 25% to 100% as compared to soil treated with 100% N through urea. To study the effect of different levels of N and neem cake on yield and uptake of nutrients by wheat a screen-house experiment was conducted. The results revealed that mean dry matter yield of wheat increased significantly with increasing levels of N upto 60 mg kg-1 over control in the presence of neem cake when it was applied at both 20 days before sowing and at the time of sowing. The dry matter yield of wheat also enhanced significantly with the increasing doses of neem cake upto 0.125% when applied at 20 days before sowing and 0.250% when applied at the time of sowing and then decreased as the doses of neem cake increased to 0.500%. The uptake of N, P and K increased significantly with increasing levels of neem cake upto 0.125% and 0.250%, respectively, when applied at 20 and 0 days before sowing. The mean uptake of Zn, Cu and Mn by wheat increased with increasing levels of N in the presence of neem cake upto 60 mg kg-1 over control when neem cake was applied at both 0 and 20 days before sowing. Mean uptake of Fe increased upto 40 mg kg-1 N when neem cake was applied at 20 days before sowing and upto 60 mg kg-1 when applied at 0 days before sowing. The mean uptake of Zn and Cu also increased with increasing levels of neem cake upto 0.125% and 0.250%, respectively, when applied at 20 and 0 days before sowing. Similarly, mean uptake of Fe increased with increasing levels of neem cake upto 0.125% in both the cases of neem cake application. However, the mean uptake of Mn by wheat decreased with increasing levels of neem cake at both 20 and 0 days before sowing. Available N, P and organic carbon content of post harvest soil samples increased with the increasing levels of nitrogen and neem cake. The post-harvest available K content decreased with the application of N but increased with the application of neem cake. |
|
Date |
2016-11-11T11:41:06Z
2016-11-11T11:41:06Z 2010 |
|
Type |
Thesis
|
|
Identifier |
http://krishikosh.egranth.ac.in/handle/1/85065
|
|
Language |
en
|
|
Format |
application/pdf
|
|
Publisher |
CCSHAU
|
|