Organic manures as a component of INM in rice Next Previous.

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Organic manures as a component of INM in rice Next Previous

Organic manures: An overview They also stabilize soils against erosion and floods, detoxify ecosystems and may even help counteract climatic change by restoring soil’s capacity to carbon sequestration. Organic manures as a component of INM in rice Next Previous Organic manures are valuable by-products of farming and allied industries, derived from plant and animal sources. These manures have the advantage of supplying secondary and micronutrient along with NPK, which is important for sustained production. Increase the biological activity in soil by providing support for earthworms, micro-organisms, fungi and bacteria and helps in nutrient cycling.

Organic manures used as a component of INM in rice b) Concentrated organic manures – contain higher percentages of major plant nutrients (NPK) as compared to bulky organic manures. Examples, oilcakes, fish manure, etc. Organic manures as a component of INM in rice Next Previous a)Bulky organic manures – supply plant nutrients in small quantities and organic matter in larger quantities. Examples, farmyard manure (FYM), biogas slurry, composts, green manure, poultry manure, etc.

Farmyard manure (FYM) Under INM practices of rice, about 50% N should generally be applied through organic manures. Hence, approximately 12 tonnes/hectare FYM would be needed to supply 60 kg N in rice. Organic manures as a component of INM in rice Next Previous FYM is a decomposed mixture of dung and urine of farm animals along with the litter (bedding material) and left-over material from roughages or fodder fed to the cattle. On an average, it contain 0.5% N, 0.2% P 2 O 5 and 0.5% K 2 O.

Biogas slurry It can be directly used in rice after mixing with irrigation water. Organic manures as a component of INM in rice Next Previous Biogas (Gobar gas) plant produces methane and biogas slurry, which could be used as a valuable manure in rice. Biogas slurry is quite rich in nitrogen than the original ingredients due to addition of living and dead micro-organisms. Biogas slurry also contains phosphates, potash, sulphur and a number of micro-nutrients like zinc and iron. Biogas slurry is extremely cheap and is made by locally available material.

Compost Both rural and urban composts could be successfully used in rice as a component of INM. The exact quantity would depend on the percentage of nutrients available in them and the proportion of nutrients to be supplied. Organic manures as a component of INM in rice Next Previous Rural Compost Rural compost mostly uses crop residues and cattle dung and urine as the raw material Urban compost urban compost uses city refuse which includes kitchen wastes, industrial wastes, waste materials from vegetable markets etc. as the raw materials

Green manures Organic manures as a component of INM in rice Next Previous 1.Green-leaf manuring : green leaves and tender green twigs collected from shrubs and trees grown on bunds, wastelands and nearby forest areas. The common shrubs and trees used are Glyricidia (Glyricidia maculata), Sesbania (Sesbania speciosa), Karanj (Pongamia pinnata), etc. This system is common in eastern, southern and central India. 2. Green manuring in situ: green manures are grown and incorporated in the same field which is to be green- manured, either as a pure crop or as an intercrop with the main crop.

Improvement in soil physical properties and benefits of rooting action, Weed suppression, soil and water conservation, enhanced crop yields Organic manures as a component of INM in rice Advantages of Green Manure Building of organic matter and improved soil structure Nitrogen fixation and enhanced soil microbial activity Enhanced availability of native soil nutrients Previous Next

Many options are available for rice crop Organic manures as a component of INM in rice Previous Next

Potential N contributions of N- fixing legumes to succeeding crops in Indian soils NameBotanical nameSowing season Average yield of green matter (t/ha) N (% on green weight basis) N added (kg/ha) SannhempCrotalaria junceaKharif DhainchaSesbania aculeataKharif MungbeanVigna radiataKharif CowpeaVigna ungiculataKharif GuarCyamopsis tetragonolobaKharif SenjiMelilotus albaRabi KhesariLathyrus sativusRabi BerseemTrifolium alexandrinumRabi Source: Yawalkar et al.(1996) Organic manures as a component of INM in rice Previous Next

On an average, green manuring saves 60 kg nitrogen/ha in rice cultivation. Green manuring is known to increase grain yield of succeeding rice by 20-50% across the different states of India. Organic manures as a component of INM in rice Previous Next Before transplanting/ sowing of rice crop, sesbania (dhaincha) and sannhemp (sanai) are the better crops for green manuring.

Poultry manure It is suitable for rice crop also and can complement the chmical and bio-fertilizers in rice cultivation. Organic manures as a component of INM in rice Previous Next It is a rich organic manure, since liquid and solid excreta are excreted together resulting in no urine loss. It can be applied to the soil directly as early as possible, and then immediately mixed into the soil. Fresh poultry manure contains about 1.5% N, 1.1% P 2 O 5 and 0.5 % K 2 O.

Oil Cakes The average nutrient content of important oilcakes is given on the next slide. Organic manures as a component of INM in rice Previous Next Many kinds of oilcakes can be used as a source of nutrients in crops. Oilcakes contain not only nitrogen, but also some phosphorus and potassium, along with a large proportion of organic matter. Before application to rice or any other crop, oilcakes should be well-powdered to facilitate their application and decomposition by soil microorganisms. Depending on crop, oilcakes are applied broadcast, drilled or placed near the root zone.

Average nutrient content of important oilcakes OilcakeN (%)P 2 O 5 (%)K 2 O (%) Castor cake Cottonseed cake undecorticated Neem cake Karanj cake Safflower cake undecorticated Groundnut cake Linseed cake Organic manures as a component of INM in rice Previous Next

Let Us Sum UP Manures like, FYM, composts, green manures and oilcakes are integral part of INM in rice. Organic manures as a component of INM in rice Previous Next Organic manures are the very important component of integrated nutrient management in the cultivation of rice. Besides supplying nutrients, they also improve the physical, chemical and biological properties of soil.