Rice straw Management

Rice straw is the main natural material accessible in huge amounts to most rice agriculturists. Around 40 percent of the nitrogen (N), 30 to35 percent of the phosphorus (P), 80 to 85 percent of the potas-sium (K), and 40 to 50 percent of the sulfur (S) taken up by riceremains in vegetative plant parts at product development. Straw is either expelled from the field, consumed in situ, heaped or spread in the field, consolidated in the dirt, or utilized as mulch for the following crop. Every one of these measures differently affects overall nutrient balance and long haul soil fruitfulness.

 

Successfully expels expansive volumes of biomass and helps control weeds and an assortment of vermin and illnesses (Ponnamperuma 1984). In any case, explore shows that the upsides of consuming are balanced by the impediments, including supplement misfortune, exhaustion of soil organic matter (SOM), and decrease within the sight of useful soil biota (Mandal et al 2004). Rice straw consumed in the field likewise causes greenhouse gas emissions (GHGE), including 0.7– 4.1 g of CH4 and 0.019– 0.057 g of N2O per kg of dry rice straw, and discharge of different vaporous contaminations, for example, SO2, NOx, HCl and, to some degree, dioxins and furans (Oanh et al 2011, Jenkins et al 2003).

Expulsion of straw from the field is boundless in India, Bangladesh, and Nepal, which clarifies the exhaustion of soil K and Si holds at many locales. Straw can be utilized as fuel for cooking, ruminant fodder ,and stable sheet material or as a crude material in modern procedures (e.g., papermaking). All the while, a few or the majority of the supplements contained in straw might be lost to the rice field, especially where creature fertilizer isused in different parts of the cultivating framework where the reaction to straw application is more prominent than for rice.

 

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