Legume Research
Web of Science
  • Year: 2025
  • Volume: 48
  • Issue: 3

Photosynthetic Pigments, Symbiotic Traits, Yield Attributes and Nutrient Uptake of Soybean Crop as Influenced by Soil Amendments on Degraded Vertisol of Chambal Tablelands

  • Author:
  • I. Rashmi1,*, Kuldeep Kumar1, Ashok Kumar1, S. Kala1, Anita Kumawat1, Rama Pal2, Yushma Sao3
  • Total Page Count: 6
  • Page Number: 462 to 467

1ICAR-Indian Institute of Soil and Water Conservation, Research Center, Kota-324 002, Rajasthan, India

2ICAR-Indian Institute of Soil and Water Conservation, Dehradun-248 195, Uttarakhand, India

3Barrister Thakur Chhedilal College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Bilaspur-495 006, Chhattisgarh, India

*Corresponding Author: I. Rashmi, ICAR-Indian Institute of Soil and Water Conservation, Research Center, Kota-324 002, Rajasthan, India, Email: rashmimenon109@gmail.com

Online Published on 18 July, 2025.

Abstract

Gypsum and organic amendments are potential ameliorants for reclamation of saline and/or sodic soil conditions to improve crop productivity and soil fertility. Application of gypsum at higher dose (>1 t ha-1) with organic amendments such as FYM, crop residue on soybean crop is largely unknown for salt affected soils. Impact of these soil amendments on soybean chlorophyll pigments, symbiotic traits, nutrient uptake, nutrient harvest index, carbohydrate equivalent yield, crop productivity and economic returns is not being addressed properly. This is particularly true for oilseed crop grown under saline conditions.

A field experiment was conducted for two years (2017 and 2018) to assess the impact of amendments like gypsum, crop residue (CR), farm yard manure (FYM) with recommended dose of nitrogen-phosphorus-potassium (RNPK) fertilizer dose on soybean crop in degraded vertisol with eight treatments and three replications laid in randomized block design.

Results revealed that among treatments, phenological traits such as total chlorophyll (1.561 and 1.593 mg g-1), carotenoid (0.156 and 0.154 mg g-1) at 30 DAS (days after sowing), nodulation traits (33.6 and 32.4 nodules plant-1) and dry matter accumulation (26.2 and 23.9 g plant-1 at harvest) improved significantly in RNPK+Gypsum+CR+FYM and RNPK+Gypsum+FYM treatments respectively. Combined application of fertilizers with organic and gypsum amendments increased soybean yield by the magnitude of 49-53% compared to only fertilizer applied treatments. Higher biological yield (4169-4339 kg ha-1), carbohydrate equivalent yield (258.8-266.5 kg ha-1) and nutrient uptake (118: 8:47:11 -140: 9: 57: 12 kg ha-1 N:P:K:S) were observed in RNPK+Gypsum+CR±FYM treatments. Economic analysis showed higher net returns and benefit-cost ratio in RNPK+Gypsum+CR (Rs 15247 and 1.48) and RNPK+Gypsum (Rs 14499 and 1.59) treatments.

Keywords

Amendments, Chlorophyll, Nodulation, Nutrient uptake, Soybean, Yield attributes