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

文献类型： 外文期刊

第一作者： Shao, Jingjing

作者： Shao, Jingjing;Dong, Helin;Jin, Yinan;LI, Pengcheng;Sun, Miao;Feng, Weina;Zheng, Cangsong;Dong, Helin

作者机构：

关键词： Cotton; Soil potassium level; Matter accumulation; Uptake and distribution

期刊名称：JOURNAL OF COTTON RESEARCH （ 影响因子：2.6； 五年影响因子：2.8 ）

ISSN： 2096-5044

年卷期： 2023 年 6 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundPotassium (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 & BULL;kg(-1)), K2 (110.90-111.26 mg & BULL;kg(-1)), K3 (123.48-128.88 mg & BULL;kg(-1)), K4 (140.13-145.10 mg & BULL;kg(-1)), K5 (154.43-155.38 mg & BULL;kg(-1)), and K6 (165.77-168.75 mg & BULL;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.ResultsThe 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.ConclusionThe 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 & BULL;kg(-1), further increasing the soil K concentration no longer had a significant positive effect on cotton growth.

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