Depth of soil compaction predominantly affects rice yield reduction by reproductive-stage drought at varietal screening sites in Bangladesh, India, and Nepal.

Autor:	Singh SP; 1Bihar Agricultural University, Sabour, Bihar India., Jain A; Barwale Foundation, Himayatnagar, Hyderabad, Telangana India., Anantha MS; Central Rainfed Upland Rice Research Station, Jharkand, Hazaribag, India., Tripathi S; Nepal Agricultural Research Council Regional Agriculture Research Station, Khajura, Banke, Nepalgunj, Nepal., Sharma S; Nepal Agricultural Research Council Regional Agriculture Research Station, Khajura, Banke, Nepalgunj, Nepal., Kumar S; 5Indian Council of Agricultural Research, Research Complex for Eastern Region, Patna, Bihar India., Prasad A; 6Indira Gandhi Agricultural University, Raipur, Chhattisgarh India., Sharma B; 6Indira Gandhi Agricultural University, Raipur, Chhattisgarh India., Karmakar B; 7Bangladesh Rice Research Institute, Regional Station, Rajshahi, Bangladesh., Bhattarai R; Regional Agricultural Research Station, Tarahara, Sunsari Nepal., Das SP; 9ICAR Research Complex for North Eastern Hill Region, Lembucherra, Tripura India., Singh SK; 10Banaras Hindu University, Varanasi, Uttar Pradesh India., Shenoy V; Barwale Foundation, Himayatnagar, Hyderabad, Telangana India., Chandra Babu R; 11Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu India., Robin S; 11Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu India., Swain P; National Rice Research Institute, Cuttack, Odisha India., Dwivedi JL; 13Crop Research Station, Narendra Dev University of Agriculture and Technology, Masodha, Kumar Ganj, Faizabad, Uttar Pradesh India., Yadaw RB; National Rice Research Program, Hardinath, Baniniya, Janakpurdham, Nepal., Mandal NP; Central Rainfed Upland Rice Research Station, Jharkand, Hazaribag, India., Ram T; 15Indian Institute of Rice Research, Rajendranagar, Hyderabad, Telangana India., Mishra KK; Nepal Agricultural Research Council Regional Agriculture Research Station, Khajura, Banke, Nepalgunj, Nepal., Verulkar SB; 6Indira Gandhi Agricultural University, Raipur, Chhattisgarh India., Aditya T; 7Bangladesh Rice Research Institute, Regional Station, Rajshahi, Bangladesh., Prasad K; 16Birsa Agricultural University, Ranchi, Jharkhand India., Perraju P; Jawaharlal Nehru Krishi Viswa Vidyalaya, Rewa, Madhya Pradesh India., Mahato RK; Regional Agricultural Research Station, Tarahara, Sunsari Nepal., Sharma S; 18International Rice Research Institute, Los Baños, Laguna Philippines., Anitha Raman K; 18International Rice Research Institute, Los Baños, Laguna Philippines., Kumar A; 18International Rice Research Institute, Los Baños, Laguna Philippines., Henry A; 18International Rice Research Institute, Los Baños, Laguna Philippines.
Jazyk:	angličtina
Zdroj:	Plant and soil [Plant Soil] 2017; Vol. 417 (1), pp. 377-392. Date of Electronic Publication: 2017 May 10.
DOI:	10.1007/s11104-017-3265-2
Abstrakt:	Aims: Drought is the major constraint to rainfed rice productivity in South Asia, but few reports provide detailed characterization of the soil properties related to drought stress severity in the region. The aim of the study was to provide a compilation of drought breeding network sites and their respective levels of drought stress, and to relate soil parameters with yield reduction by drought. Methods: This study characterized levels of drought stress and soil nutrient and physical properties at 18 geographically distributed research station sites involved in rice varietal screening in Bangladesh, India, and Nepal, as well as at farmers' fields located near the research stations. Results: Based on soil resistance to penetration profiles, a hardpan was surprisingly absent at about half of the sites characterized. Significant relationships of depth of compaction and yield reduction by drought indicated the effects of soil puddling on susceptibility to cracking, rather than water retention by hardpans, on plant water availability in this region. The main difference between research stations and nearby farmers' fields was in terms of soil compaction. Conclusions: These results present an initiative for understanding the range of severities of reproductive-stage drought stress in drought-prone rainfed lowland rice-growing areas in South Asia.
Databáze:	MEDLINE
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