News Update on Organic Fertilizer Research: July – 2019

Effect of different application rates of organic fertilizer on soil enzyme activity and microbial population

After cultivating twenty four crops of vegetables for 3 consecutive years during a greenhouse, the consequences of various application rates of compost (Rate one, two70 kilo N ha−1 y−1; Rate 2, 540 kilo N ha−1 y−1; Rate three, 810 kilo N ha−1 y−1; Rate four, 1,080 kilo N ha−1 y−1) were compared with the consequences of chemical plant food (CF) and no application of plant food treatments (CK) for a few designated soil chemical properties, microorganism populations and soil accelerator activities (dehydrogenase, cellulase, β-glucosidase, protease, urease, arysulphatase, and acid and alkalescent phosphatases). The results show that the pH scale, electrical conduction, concentrations of total element (N) and also the organic matter received from compost treatment were typically over those received through CF treatment. The soil microorganism biomass, populations of microorganism, fungi and actinomycetes, still as soil accelerator activities accrued considerably within the compost-treated soils compared with the CF-treated soil. In most instances, no important increase was ascertained within the catalyst activities studied for compost applications over a Rate two treatment. However, all catalyst activities examined showed important linear correlations with the organic matter contents of the soils. The vegetable yield reached its highest level at the speed two treatment and declined or leveled off within the higher treatments, implying that a high application rate of compost cannot additional increase the crop yield when the soil fertility has been established. High organic matter content within the soil was found to alleviate the adverse impact of soluble salts on vegetable growth. finally, AN application rate of compost at Rate two, 540 kilo N ha−1 y−1, is adequate on the idea of vegetable yields and soil chemical, organic chemistry and catalyst properties in greenhouse cultivation underneath semitropic atmospheric condition. [1]

Vermicomposting: Recycling Wastes into Valuable Organic Fertilizer. Global Theme on Agroecosystems Report no. 8

The large amount of organic waste, nearly 700 million t yr-1, generated in Asian country is either burned or land crammed move a retardant of safe disposal. To mitigate this drawback all the waste may be born-again into extremely valuable nutrient-rich compost in Associate in Nursing atmosphere friendly manner. Vermicomposting is one among the  best strategies of composting any quite organic matter, that may offer a ‘win-win’ resolution to tackle the matter of safe disposal of waste and additionally provide most required plant nutrients for property  productivity.Vermicompost improves growth, quality and yield of various field crops, flower and fruit crops.  Vermicomposting contributes to exercise of element and augments soil physico-chemical moreover as  biological properties. microorganism variety was checked and better diversity was recorded within the part rotten organic material for the vermicompost than in the vermicompost. every kind of organic material may be used for vermicomposting but, Gliricidia, tobacco leaves and chicken faeces aren’t appropriate  for angleworm multiplication however may be composted with earthworms. The optimum temperature for  vermicomposting is concerning 20–30°C and wet content ranges from thirty two to hr solely. it’s a really straightforward method and straightforward to follow moreover as cost-efficient pollution abatement technologyThe coaching programs for girls assist teams (SHGs) lined technical aspects of creating  vermicompost and its application to numerous crops. These programs are conducted by ICRISAT with  support from the Asian Development Bank (ADB), Sir Dorabji Tata Trust and District Water Management  Agency (DWMA) in Adarsha watershed (Kothapally) in Andhra Pradesh, Madhya Pradesh and jap  Rajasthan. A deadly weed, weed (locally referred as vayyari bhama or congress  weed) was found profusely on field bunds in Kothapally and different regions of Andhra Pradesh, that pent-up the crop growth and caused environmental pollution. Some case studies of ladies UN agency have step up to utilize this weed as material for vermicomposting, a secure weed disposal mechanism, are bestowed during this report. [2]

Soil micronutrient availability to crops as affected by long-term inorganic and organic fertilizer applications

Micronutrient standing in soils and crops are often plagued by completely different fertilization practices throughout a semipermanent field experiment. This paper investigated the consequences of various fertilization treatments on total and DTPA-extractable micronutrients in soils and micronutrients in crops once sixteen year fertilization experiments in Fengqiu County, Henan Province, China. The treatments of the semipermanent experiment enclosed combos of varied rates of N, P and K additionally to 2 rates of organic (OF) treatments. Winter wheat and summer maize were planted annually. Soil macro- and micronutrients along side pH scale and organic matter (OM) were analyzed. Grains and on top of ground components of each crops within the final year were harvested and analyzed for copper, Zn, Fe and Mn. The results showed that soil copper, Zn, atomic number 26 and Mn concentrations didn’t modification among the various treatments to a big level, apart from a small decrease of soil Zn within the CK (no chemical application) compared to the OF treatment. The DTPA-extractable soil Zn, atomic number 26 and Mn concentrations hyperbolic from zero.41 to 1.08 mg kg−1, from 10.3 to 17.7 mg kg−1, and from 9.7 to 11.8 mg kg−1, severally, with increasing soil OM content, so showing the importance of soil OM in matter accessibility for crops. The NPK treatment additionally had higher DTPA-extractable matter concentrations in soil. Deficiency of N or P resulted in an exceedingly low yield however high matter concentrations in crops except cubic content unit maize stalks. Higher out there soil P considerably shriveled crop micronutrients, probably due to their precipitation as metal phosphates. Maize stalks contained higher concentrations of micronutrients than those of wheat straw, whereas wheat grain had higher micronutrients than those of corn grain. The transfer coefficients (TCs) of micronutrients from straw to grain were considerably completely different between winter wheat (1.63–2.52 for Cu; a pair of.31–3.82 for Zn; no modification for Fe; zero.55–0.84 for Mn) and summer maize (0.24–0.50 for Cu; zero.50–1.21 for Zn; zero.02–0.04 for Fe; zero.07–0.10 for Mn). lastly, application of organic matter considerably hyperbolic the DTPA-extractable concentrations of Zn, atomic number 26 and Mn compared to the CK, grain and vegetative tissue within the CK and NK had higher matter concentrations than those in alternative treatments. [3]

Effect of different organic fertilizers application on growth and environmental risk of nitrate under a vegetable field

The impact of manure once totally different disposal strategies (water-logged composting, GOF; anaerobic digestion, BR; thermophilic composting, ROF) on vegetable growth and environmental risk was investigated beneath the tomato-celery-tomato field. Results showed that organic fertilizers considerably exaggerated vegetable yield and quality, however with inappropriate application could cause serious environmental risk like nitrate pollution. most vegetable yield of eighty.9, 68.3, 112.7 t•ha−1 (first, second and third rotation crop, respectively) with best vegetable quality was obtained in ROF treatment. the best N use potency with the smallest amount nitrate enrichment in soil was additionally found in ROF treatment. Moreover, beneath this fertilization method, nitrate concentration in soil leachate born to six.4 mg•L−1, that glad the brink… [4]

Effects of Neem-Based Organic Fertilizer, NPK and Their Combinations on Soil Properties and Growth of Okra (Abelmoschus esculentus) in a Degraded Ultisol of Calabar, Nigeria

A field experiment was conducted at the University of Calabar Teaching and analysis Farm to guage the results of neem-based organic, NPK and their combos on soil chemical properties and growth of okra (Abelmoschus esculentus) on a degraded Ultisol Calabar. The experiment was ordered get into a randomised complete block style with 3 replications comprising of six treatments. The treatments were management (no amendment), sole NPK 20:10:10 chemical and neem–based organic applied at one hundred twenty kilo N/ha, combos of sixty kilo N/ha NPK+ sixty kilo N/ha Azadirachta indica, ninety kilo N/ha NPK + thirty kilo N/ha Azadirachta indica and thirty kilo N/ha NPK + ninety kilo N/ha Azadirachta indica. Results showed that the soil chemical properties were influenced considerably… [5]


[1] Chang, E.H., Chung, R.S. and Tsai, Y.H., 2007. Effect of different application rates of organic fertilizer on soil enzyme activity and microbial population. Soil Science and Plant Nutrition, 53(2), pp.132-140. (Web Link)

[2] Nagavallemma, K.P., Wani, S.P., Lacroix, S., Padmaja, V.V., Vineela, C., Rao, M.B. and Sahrawat, K.L., 2004. Vermicomposting: Recycling wastes into valuable organic fertilizer. Global Theme on Agroecosystems Report no. 8. (Web Link)

[3] Li, B.Y., Zhou, D.M., Cang, L., Zhang, H.L., Fan, X.H. and Qin, S.W., 2007. Soil micronutrient availability to crops as affected by long-term inorganic and organic fertilizer applications. Soil and Tillage Research, 96(1-2), pp.166-173. (Web Link)

[4] Effect of different organic fertilizers application on growth and environmental risk of nitrate under a vegetable field

Shuyan Li, Jijin Li, Bangxi Zhang, Danyang Li, Guoxue Li & Yangyang Li

Scientific Reportsvolume 7, Article number: 17020 (2017) (Web Link)

[5] Ayito, E. O., Iren, O. B. and John, K. (2018) “Effects of Neem-Based Organic Fertilizer, NPK and Their Combinations on Soil Properties and Growth of Okra (Abelmoschus esculentus) in a Degraded Ultisol of Calabar, Nigeria”, International Journal of Plant & Soil Science, 24(5), pp. 1-10. doi: 10.9734/IJPSS/2018/43027. (Web Link)