Response Of Vegetable CowPea To Phosphorus Under Varying Moisture Levels And Plant Density
By: Mini CL.
Contributor(s): Kuruvilla Varughese(Guide).
Material type:
BookPublisher: Vellayani Department of Agronomy, College of Agriculture 1997DDC classification: 630 Online resources: Click here to access online | Click here to access online Dissertation note: MSc Abstract: An experiment was conducted at the Instructional
Farm attached to the College of Agriculture, Vellayani in the
summer rice fallows during 1994-‘95 to study the response of
vegetable cowpea cv. Malika to phosphorus under varying
moisture levels and plant density. The experiment was laid out
in strip-split plot design with 3 replications. The treatments
included three levels each of irrigation and plant density and
four levels of phosphorus.
The study revealed that the crop responded to
irrigation, plant density as well as phosphorus levels. The
biometric characters like plant height, number of leaves and
branches per plant, earliness in flowering, total DMP and yield
attributing characters like number of pods per plant were
favourably influenced by giving daily light irrigation of l0mm
(farmer1s practice) throughout the crop period. The maximum
values for the above said characters were also observed at a
plant density level of 16,667 pts/ha (1.0x0.6m) and a phosphorus
level of 45kg/ha compared to the other levels.
The maximum yield of green pods and haulm was obtained
by daily light irrigation with 10mm water and a plant density
of 16,667 pts/ha. The crop responded upto 45 kg/ha P2O5
application. The uptake of major nutrients N,P and K by the
crop also followed the same trend.
But the water-use efficiency was highest for the least
freqently irrigated treatment viz. irrigating at 15mm CPE and was
found to decrease with increase in the frequency of irrigation. A
plant density level of 16,667 pts/ha and a phosphorus level of
45kg/ha also recorded maximum water-use efficiency. Soil moisture
extraction pattern showed that less frequent the irrigation,
more the percentage of absorbtion from deeper soil layers. A plant
density level of 16,667pts/ha as well as a phosphorus level of
45kg/ha also gave maximum absorbtion from top soil layers where as a
higher plant density gave maximum absorbtion from the deeper soil
layers.
The available N, P and K contents of the soil after the
experiment indicated a decrease in the soil nutrient status with an
increase in the moisture level of the soil. The highest nutrient
status was also noted with a density level of 16,667 pts/ha and a
phosphorus level of 45kg/ha.
The results of economic analysis revealed that the net
income and benefit-cost ratio was maximum by irrigating the crop at
10mm CPE, at a plant density of 16,667 pts/ha and a phosphorus level
of 45kg/ha.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 630 MIN/RE (Browse shelf) | Available | 171253 |
MSc
An experiment was conducted at the Instructional
Farm attached to the College of Agriculture, Vellayani in the
summer rice fallows during 1994-‘95 to study the response of
vegetable cowpea cv. Malika to phosphorus under varying
moisture levels and plant density. The experiment was laid out
in strip-split plot design with 3 replications. The treatments
included three levels each of irrigation and plant density and
four levels of phosphorus.
The study revealed that the crop responded to
irrigation, plant density as well as phosphorus levels. The
biometric characters like plant height, number of leaves and
branches per plant, earliness in flowering, total DMP and yield
attributing characters like number of pods per plant were
favourably influenced by giving daily light irrigation of l0mm
(farmer1s practice) throughout the crop period. The maximum
values for the above said characters were also observed at a
plant density level of 16,667 pts/ha (1.0x0.6m) and a phosphorus
level of 45kg/ha compared to the other levels.
The maximum yield of green pods and haulm was obtained
by daily light irrigation with 10mm water and a plant density
of 16,667 pts/ha. The crop responded upto 45 kg/ha P2O5
application. The uptake of major nutrients N,P and K by the
crop also followed the same trend.
But the water-use efficiency was highest for the least
freqently irrigated treatment viz. irrigating at 15mm CPE and was
found to decrease with increase in the frequency of irrigation. A
plant density level of 16,667 pts/ha and a phosphorus level of
45kg/ha also recorded maximum water-use efficiency. Soil moisture
extraction pattern showed that less frequent the irrigation,
more the percentage of absorbtion from deeper soil layers. A plant
density level of 16,667pts/ha as well as a phosphorus level of
45kg/ha also gave maximum absorbtion from top soil layers where as a
higher plant density gave maximum absorbtion from the deeper soil
layers.
The available N, P and K contents of the soil after the
experiment indicated a decrease in the soil nutrient status with an
increase in the moisture level of the soil. The highest nutrient
status was also noted with a density level of 16,667 pts/ha and a
phosphorus level of 45kg/ha.
The results of economic analysis revealed that the net
income and benefit-cost ratio was maximum by irrigating the crop at
10mm CPE, at a plant density of 16,667 pts/ha and a phosphorus level
of 45kg/ha.
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