Q49: Khaira disease of rice is due to deficiency of : - Soil Science & Agricultural Chemistry - RPSC Assistant Agriculture Officer 2011 | Agrigyan

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RPSC Assistant Agriculture Officer 2011

MCQ (Single Correct)

Khaira disease of rice is due to deficiency of :

धान का खैरा रोग (Khaira disease) किसकी कमी के कारण होता है ?

Zinc जस्ता Iron लोहा Nitrogen नाइट्रोजन Calcium कैल्शियम

Khaira disease of rice is a widely known physiological disorder caused by Zinc ($Zn$) deficiency in wetland paddy soils.
It was first discovered and reported in India by eminent plant pathologist Dr. Y.L. Nene in 1966 at the Govind Ballabh Pant University of Agriculture and Technology (GBPUA&T), Pantnagar, Tarai region.
Symptoms appear 2-3 weeks after transplanting, characterized by chlorosis between veins of young leaves, followed by reddish-brown or bronze pigmentation and severely stunted plant growth.
It is controlled by foliar spraying of 5 kg zinc sulphate ($ZnSO_4$) + 2.5 kg slaked lime in 1000 liters of water per hectare. Thus, Zinc (Option 1) is correct.

धान का 'खैरा रोग' (Khaira disease) मृदा में जस्ता या जिंक ($Zn$) की कमी के कारण होने वाला एक प्रमुख पोषण विकार है।
इस रोग की खोज सर्वप्रथम वर्ष 1966 में पंतनगर (उत्तराखंड) के तराई क्षेत्र में प्रसिद्ध वैज्ञानिक डॉ. वाई.एल. नेने द्वारा की गई थी।
इसमें रोपाई के 2-3 सप्ताह बाद पौधों की निचली पत्तियों पर हल्के पीले धब्बे बनते हैं जो बाद में कत्थई या जंग जैसे भूरे रंग में बदल जाते हैं तथा पौधों की वृद्धि रुक जाती है।
इसकी रोकथाम हेतु 5 किग्रा जिंक सल्फेट तथा 2.5 किग्रा बुझे चूने का 1000 लीटर पानी में घोल बनाकर प्रति हेक्टेयर छिड़काव किया जाता है। अतः विकल्प 1 (जस्ता) सही उत्तर है।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

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