Split-nitrogen application increases nitrogen-use efficiency and yield of cotton

Feng, Weina; Li, Pengcheng; Zheng, Cangsong; Sun, Min; Shao, Jingjing; Li, Xiao-Fei; Dong, Helin

doi:10.1007/s10705-023-10267-z

Cited by 4 publications

(1 citation statement)

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“…Seed cotton production efficiency of K/(g generally applied in the field to ensure that the cotton plant has enough nutrients. Reasonable application of fertilizer can effectively increase N, P, and K contents and crop yield ( Feng et al 2023;Khalifa et al 2012;Xu and Li 2014). However, excessive fertilizer or hypo-fertilization will inhibit the absorption of nutrients by crops, which is not conducive to the improving of fertilizer utilization, yield and quality (Byju and Anand 2009).…”

Section: Treatmentmentioning

confidence: 99%

Effects of soil potassium levels on dry matter and nutrient accumulation and distribution in cotton

et al. 2023

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Background Potassium (K) is an essential nutrient for plant growth and development. However, plant fertilization ignoring the soil K level is very likely to cause excessive fertilizer use, and further arouse a series of side effects. This study investigated the response of cotton growth to different soil K levels and the uptake of major nutrients, aiming to evaluate the appropriate K supply level for cotton growth. Using a random block design with 6 soil K levels, we conducted 18 micro-zones field experiments over two continuous years. The soil available K concentration of each treatment was K1 (99.77–100.90 mg·kg−1), K2 (110.90–111.26 mg·kg−1), K3 (123.48–128.88 mg·kg−1), K4 (140.13–145.10 mg·kg−1), K5 (154.43–155.38 mg·kg−1), and K6 (165.77–168.75 mg·kg−1). Cotton nutrient contents, soil nutrient contents, accumulation and distribution of dry matter in cotton were determined, and the relationships between K content in soil and plants and dry matter accumulation were analyzed. Results The soil K content had a significantly positive relationship with dry matter and K accumulation in cotton plants. There were significant differences in dry matter accumulation, single-plant seed cotton yield, mineral nutrient uptake and the proportion of K accumulation in reproductive organs among different soil K levels. The results showed that there was significant difference between K4 and lower K level treatments (K1 and K2), but no significant difference between K4 and higher K level treatments (K5 and K6) in dry matter, single-plant seed cotton yield, or accumulation, distribution and seed cotton production efficiency of N, P and K. Conclusion The soil K level of K4 was able to provide sufficient K for cotton growth in our experiment. Therefore, when the soil K level reached 140.13 mg·kg−1, further increasing the soil K concentration no longer had a significant positive effect on cotton growth.

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Section: Treatmentmentioning

confidence: 99%