The statistically analysed pool data of two year experiments (Table 1) revealed that different levels of integrated nutrient management, crop geometry and cycocel treatments brought out significant response in quality attributes of cabbage. The highest moisture content (92.56%) was recorded in treatment C
2F
3S
3 which was statistically at par with C
3F
3S
2 while lowest moisture content (85.39%) was observed in treatment C
1F
1S
2. Manure and fertilizers in the form of 50% vermicompost and inorganic fertilizers (50% RDF) at wider spaced geometry make good soil environment that insist the higher uptake of water which ultimately increase the higher percentage of moisture in cabbage head. The results are in the line of findings of
Hatano et al. (2003) and
Islam (2011). As per dry matter content the inorganic source of fertilizers responded higher dry matter content in cabbage heads irrespective of spacing. Thus the maximum dry matter content (14.40%) was observed in treatment C
1F
1S
1 which was statistically at par with C
1F
1S
2 and C
1F
1S
3 while lowest dry matter content (7.44%) was recorded in treatment C
2F
3S
3. Dry matter of head cabbage was markedly enhanced by inorganic fertilizer irrespective of plant spacing under different doses of cycocel treatment. The possible reason for increase in dry matter might be due to more contribution of minerals through the matured leaves and stem for the development of head by supplying higher carbohydrate to head contributing to higher dry matter content. Increase of cycocel dose suppressed gibberellic acid synthesis leading to clear reduction in dry weight. These finding are in the line of the results reported by
Sorenson (1999),
Loncaric, et al. (2003),
Carter et al., (1997) and
Choudhary and Choudhary (2005).
On perusal of data in Table 1 revealed that the different levels of integrated nutrient management, crop geometry and cycocel treatments brought out non-significant response in ascorbic acid content in cabbage heads. However, the highest ascorbic acid content was recorded in treatment C
2F
3S
3 (40.31mg/100g wet weight) followed by C
2F
3S
2 whereas, lowest ascorbic acid content (23.37 mg/100g wet weight) was found in treatment C
2F
1S
1. The maximum ascorbic acid content in cabbage was recorded in the treatment having 50% Vermicompost + 50% RDF in combination with 300 ppm cycocel at wider crop geometry (45 cm x 45 cm). This might be due to physiological response of vermicompost with inorganic sources of nutrients for activation of various enzymes and due to more transport of energy to the head. Similar findings were also observed by
Mehandran and Kumar (1998),
Sharma and Chandra (2003),
Upadhyay et al., (2007), Wang et al., (2010) and
Rai et al. (2013), in cabbage.
In terms of phosphorus content the highest phosphorus content (89.82 µg/ml) was observed in treatment C
2F
3S
3 followed by C
3F
3S
3 and C
3F
3S
2 while the lowest content was recorded in treatment C
2F
2S
1 (40.12 µg/ml). The increase in available phosphorus content in plants by combination of vermcompost and RDF under cycocel treatment at wider crop geometry might be attributed to greater mineralization of native soil phosphorus by reducing ability of soil mineral to fix phosphorus and increased its availability through liberation of organic acid. The organic material as a protective covering on sesquioxide reduced the phosphate fixation capacity of soil and hence increased the phosphorus status in plants. The similar finding has also been reported by
Sharma et al., (2005).
The highest calcium content (1192.88µg/g wet weight) was observed in treatment C
2F
3S
3 which was found statistically at par with treatment C
3F
1S
2, C
3F
2S
2, C
1F
3S
2, C
1F
3S
3, C
3F
3S
1 and C
3F
3S
2 whereas, lowest content of calcium (614.89 µg/g wet weight) was noted in treatment C
1F
1S
1. The higher amount of Ca observed by the integrated nutrient management through organic and inorganic sources might be due to mineralization of micronutrients in the soils which exerted the more root pressure flow to carry adequate amounts of water-soluble Ca to the cabbage head. Calcium also helps in formation of new tissue such as meristematic tips, young leaves and often exhibit distorted growth from improper cell wall formation. It is also activating certain enzymes and to send signals that coordinate certain cellular activities. Similar findings were also reported by
Kuo et al. (1981),
Tetsuo and Sonoda (1981) and
Padamwar and Dakore (2010).
The data shown in Table 1 revealed that the different levels of integrated nutrient management, crop geometry and cycocel brought out significant responses for magnesium and chlorophyll content in cabbage. The highest content of magnesium (0.0497 µg/g wet weight) was recorded in plants treated with C
2F
3S
3 which was statistically at par with treatments C
1F
3S
1, C
1F
3S
2 and C
2F
3S
1 whereas, minimum magnesium content was observed in treatment C
1F
1S
1 (0.0253 µg/g wet weight). The magnesium content increased positively by the integration of vermicompost and inorganic fertilizers {50% RDF Inorganic Fertilizer + 50% Organic (vermicompost)} along with 300 ppm cycocel under wide spaced crop might be due to mineralization of nutrients leading to subsequent uptake of magnesium. It is worth to mention here that Mg is vital for biosynthesis of chlorophyll and cytochrome led to more activation of the photosystems as well as higher energy transfer from PS-I and PS-II. The increment in magnesium content in plant has positively boosted the relative rate of plant growth. The above findings are in the lines of
Balakrishnan et al., (2000),
Riga and Anza (2003) and
Talat et al., (2014). In terms of chlorophyll content the highest Chlorophyll A content was found in treatment C
2F
3S
3 (8.55 µg/g fresh weight) followed by C
3F
3S
1 whereas, lowest content (0.338µg/g fresh weight) was recorded in plants treated under C
1F
1S
1. The highest Chlorophyll B content (2.17 µg/g fresh weight) was also observed in treatment C
2F
3S
3 while the lowest Chlorophyll B content (0.29 µg/g fresh weight) was recorded in treatment C
1F
1S
2.The increase in chlorophyll A and Chlorophyll B might be due to synergistic effect of organic, inorganic source of nutrients having 50% RDF (inorganic) + 50% vermicompost and particularly cycocel treatments which might be delaying the leaf senescence and hence keeping the green pigment from degradation. These results are in agreement with those reported by
Emden and Cocks hull (1967) in cabbage.
In terms of total chlorophyll content in different treatments the highest total chlorophyll content (9.84 µg/g fresh weight) was observed in treatment C
2F
3S
3 followed by C
3F
3S
1 and C
2F
3S
1 while the least amount of total chlorophyll content was found in treatment C
1F
1S
1. The application of 50% vermicompost coupled with 50% inorganic fertilizer along with cycocel treatment under wider crop geometry (45 cm x 45 cm) was superior over rest of the treatments. Treatments in which inorganic sources were used without organic fertilizers the chlorophyll content was less. The organic fertilizer in combination with inorganic along with 300 ppm cycocel under wider crop geometry found better for enhancing the chlorophyll content. This might be due to significant enhancement of availability of macro and micro nutrients in the soil, as consequence of which the quality would have been increased. Application of plant growth retardant such as cycocel might have increases the content of cytokinin which resulted in enhancing the amount of leaf chlorophyll. These results are supported with the finding of
Chinaswamy and Mariakulandi (1996),
Mehaendran and Kumar (1998),
Dole and Wilkins (2005) and
Rosseni et al. (2005).