Growth Analysis in Sugarcane Ratoon Crop as Influenced by Potassium Nutrition in Subtropical India. Issue 1 (2nd January 2023)

• Record Type: Journal Article
• Authors: Shukla, S. K.; Jaiswal, V P; Sharma, Lalan; Gaur, Asha; Tiwari, Raghvendra; Srivastava, Abhay
• Is Part Of: Communications in soil science and plant analysis. Volume 54:Issue 1(2023)
• Page Start: 83
• Page End: 95
• Publication Date: 2023-01-02
• Subjects: Crop growth rate -- dry matter accumulation -- net assimilation rate -- net photosynthetic rate -- tiller population -- sugar yield; Soil science -- Periodicals; Plants -- Chemical analysis -- Periodicals; Agricultural chemistry -- Periodicals; 631.405
• DOI: 10.1080/00103624.2022.2109665
• Languages: English
• ISSNs: 0010-3624

Abstract

ABSTRACT: A field experiment was conducted for two cropping seasons during 2016–19 at the ICAR-Indian Institute of Sugarcane Research, Lucknow, Uttar Pradesh, India, with the objectives to study the effect of i) K nutrition and variable sources of K on growth analysis of sugarcane ratoon crop, ii) the response of K on the photosynthetic rate of crop and iii) contribution of K on yield attributes, sugarcane, and sugar yields. Mean results of two cropping seasons indicated that the application of potassium brought forth a 12.08% improvement in tiller population over no K (107.3 thousand/ha). Potassium application through K2 SO4 (SOP) showed the highest net rate of photosynthesis (15.28 µmol/m 2 /s) which was about 30.71% higher than the control. Among the various sources of K, SOP was found the best in improving sugarcane and sugar yields. Application of SOP resulted in 18.69% ratoon cane yield improvement over the control. Application of 75% K through K2 SO4 resulted in a higher sugar yield (12.01 t/ha) which was 25.76% higher than the control (9.55 t/ha). Potassium ammonium sulfate (PAS) and murate of potash could not produce better results as compared to K2 SO4 . Potassium application through SOP showed the highest net rate of photosynthesis (15.28 µmol/m 2 /s) during the grand growth phase. Application of 50.4 kg K/ha (75% more than recommended) through K2 SO4 increased 18.69% sugarcane (106.7 t/ha) and 25.76% (12.01 t/ha) sugar yields over the control (no K) and was found to the best and could be recommended for improving sugarcane and sugar yields of ratoon in subtropical India.