期刊论文详细信息
Frontiers in Environmental Science
Rice Productivity, Zn Biofortification, and Nutrient-Use Efficiency as Influenced by Zn Fertilization Under Conventional Transplanted Rice and the System of Rice Intensification
G. A. Rajanna1  M. N. Harish2  Anil Kumar3  Vishal Tyagi4  Pankaj Sood5  Shakuntla Rahi5  D. S. Yadav5  O. C. Thakur5  Y. V. Singh6  Anchal Dass7  T. Varatharajan7  R. S. Bana7  Vijay Pooniya7  Shivadhar7  Anil K. Choudhary8  V. K. Dua8  Sushil Kumar8  Ingudam Bhupenchandra9  Adarsh Kumar1,10  Mahendra Vikram Singh Rajawat1,10  Seema Sepat1,11  S. Vijayakumar1,12  K. R. Siranta1,13 
[1] 0ICAR–Directorate of Groundnut Research, Regional Station, Rekalakunta, Ananthapur, India;1ICAR–Indian Horticultural Research Institute, Farm Science Centre, Gonikoppal, India;2GAD Veterinary and Animal Sciences University, Farm Science Centre, Tarn Taran, India;3ICAR-Indian Institute of Seed Sciences, Mau, India;CSK Himachal Pradesh Agricultural University, Farm Science Centre, Sundernagar, India;Centre for Conservation and Utilization of Blue-Green Algae (CCUBGA), ICAR-Indian Agricultural Research Institute, New Delhi, India;Division of Agronomy, ICAR-Indian Agricultural Research Institute, New Delhi, India;Division of Crop Production, ICAR-Central Potato Research Institute, Shimla, India;ICAR-KVK, Tamenglong, ICAR Research Complex for NEH Region, Manipur Centre, Imphal, India;ICAR-National Bureau of Agriculturally Important Microorganisms, Mau, India;ICAR–Indian Institute of Maize Research, Ludhiana, India;ICAR–Indian Institute of Rice Research, Hyderabad, India;Samaj Kalyan Avam Vikas Mandal, Karsog, India;
关键词: conventionally transplanted rice;    Zn-use efficiency;    Zn biofortification;    system of rice intensification;    nutrient management;    rice productivity;   
DOI  :  10.3389/fenvs.2022.869194
来源: DOAJ
【 摘 要 】

The northwestern Himalayas (NWH) in India have low rice productivity (∼2 t ha−1) and quality due to poor crop and nutrient management in predominantly Zn-deficient soils. Hence, a field experimentation in the NWH compared the conventionally transplanted rice (CTR) and the system of rice intensification (SRI) under three nutrient management practices (NMPs), viz., 1) farmers’ fertilization practice, FYM @ 5 t ha−1 + N:P2O5:K2O @ 50:40:20 kg ha−1 (FFP); 2) recommended dose of fertilization, FYM @ 10 t ha−1 + N:P2O5:K2O @ 90:40:40 kg ha−1 (RDF); and 3) RDF + Zn fertilization using ZnSO4 @ 25 kg ha−1 (RDF + Zn). The results revealed that SRI practice harnessed a significantly higher rice yield under different NMPs (6.59–8.69 t ha−1) with ∼1.3–1.4- and ∼3.3–4.3-fold enhancements over the CTR and average rice productivity in NWH, respectively. SRI had the greatest improvement in panicle number hill−1 by ∼2.4 folds over the CTR. RDF + Zn had a significantly higher grain (10.7; 7.9%) and straw yield (28.9; 19.7%) over FFP and RDF, respectively, with significant augmentation of Zn biofortification in grains (11.8%) and Zn uptake (23.9%) over the RDF. SRI also enhanced the Zn concentrations in rice grains and straws by ∼4.0 and 2.7% over CTR with respective increases of 36.9 and 25.9% in Zn uptake. The nutrient harvest index and partial factor productivity of applied nutrients (NPK) had a higher magnitude under SRI and RDF + Zn over their respective counterparts, i.e., CTR and RDF. In addition, SRI had higher AE-Zn, CRE-Zn, and PE-Zn to the tune of 119.6, 63.4, and 34%, respectively, over the CTR. Overall, SRI coupled with RDF + Zn in hybrid rice assumes greater significance in enhancing the rice productivity with better Zn-biofortified grains besides higher nutrient use efficiencies to combat widespread malnutrition and acute Zn deficiencies in humans and livestock in the northwestern Himalayas.

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