Open Access Original Research Article

Impact of Repeated Applications of Chemical Fertilizers in Mulberry Cropping System on Soil Health, Leaf Production and Rearing Parameters of Silkworm, Bombyx mori L.

S. Arulmozhi Devi, N. Sakthivel

International Journal of Plant & Soil Science, Page 1-11
DOI: 10.9734/IJPSS/2018/41812

Aim: To find out the effect of continuous use of chemical fertilizers in the mulberry ecosystem.

Study Design: CRBD

Place and Duration of Study: Potential sericulture cluster in Erode district of Tamil Nadu, India, between January 2015 and December 2016.

Methodology: Standard methodologies used to study the physical, chemical and biological properties of soil, foliar constituents of mulberry and rearing parameters of the silkworm.

Results: Repeated applications of chemical fertilizers in mulberry cropping system registered more bulk density (1.57 mg m-3), PH (9.22) and EC (0.361 dS/m) and reduced field capacity (23.47%), water holding capacity (39.15%), porosity (35.60%), infiltration rate (3.20 cm/hr-1) and the population of soil microbes viz. bacteria (19.66 cfu/g), fungi (13.00 cfu/g) and actinomycetes (9.33 cfu/g) when compared to the respective values of manuring practices with 100% organic inputs (1.23 mg m-3, 7.39, 0.106 dS/m & 31.25%, 58.59%, 49.25% & 7.68 cm/hr-1  and 68.00 cfu/g, 25.33 cfu/g & 21.33 cfu/g). Lowest contents of available N (105 kg/h), P (9.75 kg/ha & K 318.70 kg/ha recorded in the gardens repeatedly received inorganic fertilizers than organic farming system (283.73, 35.81 & 340.12 kg/ha of NPK) which reflected adversely on mulberry leaf yield (43.41 MT/ha/yr) and moisture content (60.53%), moisture retention capacity (63.66%), total protein (16.83%) and total carbohydrates (28.03%) whereas in organic farming the respective values (55.80 MT/ha/yr, 71.33%, 93.36%, 21.60% & 36.23%) were found superior. Organic manuring practices registered better cocoon yield (88.348 kg/100 dfls) and average cocoon productivity (3286 kg/ha of mulberry garden) when compared to chemical farming (55.595 kg/100 dfls and 3286 kg/ha of mulberry garden).

Conclusions: A holistic approach should be made for creating awareness among the sericulture farmers and popularizing organic farming strategies to maintain soil health, improve production of quality mulberry leaf and sustainable production of silk

Open Access Original Research Article

Survey for the Incidence of Fusarium Wilt of Coriander in Latur, Osmanabad and Beed Districts of Maharastra

Kamala Rani Bammidi, B. P. Dandnayak

International Journal of Plant & Soil Science, Page 1-5
DOI: 10.9734/IJPSS/2018/42513

The research experiment was conductedin three districts of Marathwada region on Fusarium wilt              of coriander in college of agriculture, department of plant pathology. A roving survey of coriander  wilt was conducted in coriander growing areas during kharif, 2016-2017 in Latur, Osmanabad                  and Beed districts to assess coriander wilt incidence. A total of 38 locations were surveyed in               three districts. The results showed a range of disease incidence between 8 to 24%. The mean lowest wilt incidence was observed in Latur district (11.42%) followed by Beed (13.71%) and Osmanabad (17.09%). During the surveyit was observed that the incidence of wilt was higher at seedling stage

Open Access Original Research Article

Effect of Enriched Phosphatic Sludge Application on Growth and Nutrient Uptake of Finger Millet Crop under Greenhouse Conditions

Moram Harsitha, N. B. Prakash, Eresh .

International Journal of Plant & Soil Science, Page 1-6
DOI: 10.9734/IJPSS/2018/38714

A pot culture experiment was conducted to assess the effect of different levels of enriched phosphatic sludge (EPS) application on growth and nutrient uptake of finger millet crop grown under greenhouse conditions. Before application, EPS was analyzed for various parameters. The analytical results revealed that the pH value of EPS was alkaline in reaction (8.03), medium in salt content (0.97 dS m-1) and high in organic carbon (11.30 %) content. With respect to nutrient composition, EPS had high amount of phosphorus (6.88 %) and the total N, K, Ca, Mg and S contents were also appreciable in the enriched phosphatic sludge (1.51, 1.20, 1.50, 1.10 and 1.20 %, respectively), Application of RDF + EPS at 750 kg ha-1 showed significantly higher plant height and number of leaves during all the plant growth stages. Maximum shoot (20.47 g pot-1) and root dry matter (10.10 g pot-1) of finger millet was recorded with application of RDF + EPS at 750 kg ha-1. Higher N (2.28 %), P (0.42 %) and K (2.60 %) content in above ground dry matter of finger millet was recorded with the application of RDF + EPS @ 750 kg ha-1. Higher N (468.61 mg pot-1), P (86.32 mg pot-1) and K (535.40 mg pot-1) uptake in above ground dry matter of finger millet was observed with the application of EPS at 750 kg ha-1 along with RDF as compared to other levels of EPS

Open Access Original Research Article

Evaluation of Agronomic Performance of Green Gram Accessions Grown under Reduced Light Intensity in the Arid and Semi-Arid Areas of Kenya

M. K. Masaku, S. M. Githiri, C. M. Onyango, P. W. Masinde

International Journal of Plant & Soil Science, Page 1-11
DOI: 10.9734/IJPSS/2018/41813

Green gram (Vigna radiata (L.) is the hardiest of all pulses and is well adapted to Arid and Semi-Arid Areas (ASALs). However, the high light intensities, temperatures and erratic rainfall experienced in these areas lead to high evapo-transpiration rates leaving very little water available for plant use, thus negatively affecting growth and yield parameters. This study was conducted to evaluate the effect of reduced light intensity on agronomic performance of four high yielding green gram accessions (GBK-022494A, GBK-022501A, GBK-022502A and Nylon-1). The study was carried out at Kiboko in Makueni County, Kenya during the 2012 short and 2013 long rain seasons. A Shade net used in this study reduces light intensity by 35 percent. The experiment was laid out in a split-plot arrangement with three replications. The main plot treatment was shading at two levels; shaded and non-shaded while the 4 accessions formed the sub-plots. Data on plant height, days to flowering, days to maturity, pods per plant, seeds per pod, weight of 100 seeds and seed yield was collected. Results indicated that during the short rain season, accessions had significant (P≤.01) differences in the number of pods per plant, seed weight and plant height. Accession GBK-022501A was the tallest (55.1 cm) while Nylon-1 was the shortest (44.4 cm); Nylon-1 had the least (12.4 g) seed yield while GBK-022501A had the highest (17.2 g) seed yield. Shading created significant (P<.05) differences in seeds obtained per pod where production under shade gave an average of 9 seeds per pod compared to each 8 seeds in the open sunlight condition during the short rain seasons. During 2013 rain season, shade had significant (P<.05) effect on plant height and pod length. Under shade net plant height was 54.7 cm while under control, open sunshine condition it was 50 cm. Pod length under shade was 7.7 cm while under control, it was 7.4 cm. Generally, agronomic performance of green gram was improved by shading during the short rains unlike the long rains where growing in the open sunshine condition led to more robust growth and yield. It is therefore recommended that growers incorporate shading in their green gram production during periods of high light intensity

Open Access Original Research Article

Root Restriction Effects on Physiology of Zantedeschia aethiopica

M. Piotti, J. Molinari, A. Pagani, E. Giardina, A. Di Benedetto

International Journal of Plant & Soil Science, Page 1-15
DOI: 10.9734/IJPSS/2018/42140

Previous results from ornamental plants suggest that shoot biomass accumulation is a function of roots biomass. The possibility of cropping Zantedeschia aethiopica from seeds in either greenhouse-amended soils or pot substrates allow for quantify the effect of a root restriction on growth and plant quality. The root restriction syndrome has been related to an insufficient cytokinin supply from roots but the physiological mechanisms involved in geophyte ornamental plants are lacking. The aim of this work was to characterize seedling Z. aethiopica growth under two different root restrictions environments (greenhouse-amended soils or pot substrate) and the effect of a single 6, benzyl amino purine (BAP) spray on the hypothesis that the lesser root restriction the higher both post-transplant fresh-dry weight accumulation and leaf area expansion. Results showed a higher fresh-dry weight, leaf area and leaf number in plants from pots with a Sphagnum magellanicum peat-base substrate. A single BAP spray increased responses mainly in pot-grown plants. Positive relationships between the rate of leaf area expansion (RLAE), the leaf appearance rate (RLA), the relative growth rate (RGR), the net assimilation rate (NAR) and root dry weight were found. These results showed that a root restriction related to substrate compaction in pots has a lesser impact on Z. aethiopic plant growth that a root restriction related to compaction in soils, which cannot be overridden by a single 100 mg L-1 BAP spray.