ISSN:
1573-5036
Keywords:
Availability
;
Cropping system
;
Fertilizer response
;
Phosphorus
;
Rice-wheat rotation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary To work out efficient utilization and to standardize P requirement of rice-wheat rotation, a field experiment is in progress on Fatehpur loamy sand (Typic, Ustochrepts) soil at PAU Farm Ludhiana, since summer 1977. Soil of the experimental site was non-saline, alkaline, low in available P, N and oxidizable organic matter and medium in available K. Three years' yield data revealed that only wheat responded to fertilizer P in the rotation indicating thereby that 26 kg P ha−1 applied to wheat only, in rice-wheat rotation, was sufficient to meet P requirement of both crops. This suggested that for efficient use and economic returns from fertilizer input, the fertilizer schedule should be worked out in the cropping system rather than on a single-crop basis. To explain the differential response, of rice and wheat to P application, an incubation study under simulated moisture and temperature conditions of the two crop cultures was carried out in the laboratory. Results indicated that high temperature (33±2°C) in combination with high soil moisture content (150 per cent of saturation capacity) representing growth conditions of rice culture increased P availability significantly as compared to its content at low temperature (13±2°C) and soil moisture content of about field capacity (50 per cent of saturation capacity) representing conditions of wheat culture. Application of FYM increased available P under both the situations, however, its impact was more pronounced under conditions of rice culture. But effect of N (urea) application on the P availability of soil under the given situations was not significant.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02143611
