Effects of One-off Reduced Fertilization of Slow-release Fertilizer on Nitrogen Accumulation and Yield of Machine-picked Cotton

doi:10.11924/j.issn.1000-6850.casb2020-007

Abstract

Abstract:

To study the effect of one-off fertilization of slow-release fertilizer on the absorption of N, P, K and yield of machine-picked cotton, and determine the suitable fertilizer application amount for cotton area of Wangjiang, a field experiment was conducted using ‘Zhong915’ with treatments of three factors of nitrogen, phosphorus and potassium, and four fertilizer rates according to ‘3414’ fertilizer experiment model. The results showed that the boll number per plant and the boll weight of cotton under different fertilization treatments were higher than no fertilization treatment (CK), the lint yield of different fertilization treatments was 834.83-1443.35 kg/hm², compared with that of CK, the lint yield increased by 37.9%-138.4%, and the lint yield of treatment of N₂P₂K₂(N 150 kg/hm²、P₂O₅ 75 kg/hm²、K₂O 120 kg/hm²) was the highest. Compared with CK, the nitrogen accumulation per plant of cotton increased by 37.2%-79.4% under different fertilizer rates, with the increase of nitrogen accumulation per plant first increased and then decreased, and treatment of N₂P₂K₂had the largest nitrogen accumulation per plant. The accumulation of phosphorus per plant was significantly higher than that of CK, increased by 8.1%-53.5%, that of the treatment N₁P₁K₂ (N 75 kg/hm², P₂O₅ 37.5 kg/hm², K₂O 120 kg/hm²) was the largest, and then was that of treatment N₂P₂K₂. The accumulation of potassium accumulation per plant was significantly higher than that of CK, increased by 29.9%-97.0%, that of the treatment N₂P₂K₃(N 150 kg/hm², P₂O₅ 75 kg/hm², K₂O 180 kg/hm²) was the largest, followed by that of N₂P₃K₂(N 150 kg/hm², P₂O₅ 112.5 kg/hm², K₂O 120 kg/hm²) and N₂P₂K₂. Overall, the treatment of N₂P₂K₂ is the most suitable for achieving high yield and good correlated characters. Based on the comprehensive analysis of nutrient absorption and yield components, it is suggested that the most suitable fertilizer application amount of N, P and K should be N 150 kg/hm², P₂O₅ 75 kg/hm² and K₂O 120 kg/hm².

Key words: machine-picked cotton, ‘3414’ experiment design, nutrient absorption, yield and yield components, optimum amount of fertilization

CLC Number:

S143

Chen Min, Zheng Shufeng, Xu Daoqing, Liu Xiaoling, Wang Wei, Li Shuying, Kan Huachun. Effects of One-off Reduced Fertilization of Slow-release Fertilizer on Nitrogen Accumulation and Yield of Machine-picked Cotton[J]. Chinese Agricultural Science Bulletin, 2021, 37(4): 19-24.

Figures/Tables 10

References 25

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处理	纤维长度/mm	整齐度指数/%	断裂比强度/(cN/tex)	马克隆值	伸长率/%
N₀P₀K₀	29.01±0.19b	86.97±0.33a	30.10±0.50b	5.80±0.02a	7.07±0.05b
N₀P₂K₂	28.95±0.40b	87.53±1.36a	30.03±0.62b	5.64±0.26a	7.23±0.21ab
N₁P₂K₂	29.21±0.88ab	88.00±0.78a	31.50±0.93a	5.68±0.05a	7.13±0.17ab
N₂P₀K₂	30.16±0.65ab	88.23±1.52a	33.13±1.39a	5.62±0.16a	7.27±0.05ab
N₂P₁K₂	30.43±1.10a	87.73±0.37a	31.53±0.71a	5.64±0.09a	7.30±0.08ab
N₂P₂K₂	30.15±0.30ab	87.90±0.33a	31.67±1.11a	5.59±0.07a	7.30±0.08ab
N₂P₃K₂	29.97±0.54ab	88.00±0.85a	31.53±1.19a	5.78±0.19a	7.27±0.05ab
N₂P₂K₀	29.98±0.11ab	88.07±1.11a	32.17±1.93a	5.65±0.18a	7.27±0.12ab
N₂P₂K₁	29.62±0.59ab	87.57±0.57a	30.10±1.14b	5.63±0.24a	7.13±0.05b
N₂P₂K₃	29.65±0.24b	88.23±0.34a	30.27±0.95b	5.61±0.10a	7.17±0.09ab
N₃P₂K₂	29.83±0.27ab	87.67±0.25a	31.63±1.68a	5.67±0.17a	7.37±0.05a
N₁P₁K₂	29.29±0.45b	87.27±1.09a	30.23±0.37b	5.62±0.16a	7.13±0.05ab
N₁P₂K₁	29.37±0.32ab	87.43±1.35a	30.33±0.77b	5.69±0.03a	7.10±0.08b
N₂P₁K₁	30.02±0.58ab	87.30±0.83a	30.57±1.23ab	5.72±0.20a	7.17±0.17ab

处理	纤维长度/mm	整齐度指数/%	断裂比强度/(cN/tex)	马克隆值	伸长率/%
N₀P₀K₀	29.01±0.19b	86.97±0.33a	30.10±0.50b	5.80±0.02a	7.07±0.05b
N₀P₂K₂	28.95±0.40b	87.53±1.36a	30.03±0.62b	5.64±0.26a	7.23±0.21ab
N₁P₂K₂	29.21±0.88ab	88.00±0.78a	31.50±0.93a	5.68±0.05a	7.13±0.17ab
N₂P₀K₂	30.16±0.65ab	88.23±1.52a	33.13±1.39a	5.62±0.16a	7.27±0.05ab
N₂P₁K₂	30.43±1.10a	87.73±0.37a	31.53±0.71a	5.64±0.09a	7.30±0.08ab
N₂P₂K₂	30.15±0.30ab	87.90±0.33a	31.67±1.11a	5.59±0.07a	7.30±0.08ab
N₂P₃K₂	29.97±0.54ab	88.00±0.85a	31.53±1.19a	5.78±0.19a	7.27±0.05ab
N₂P₂K₀	29.98±0.11ab	88.07±1.11a	32.17±1.93a	5.65±0.18a	7.27±0.12ab
N₂P₂K₁	29.62±0.59ab	87.57±0.57a	30.10±1.14b	5.63±0.24a	7.13±0.05b
N₂P₂K₃	29.65±0.24b	88.23±0.34a	30.27±0.95b	5.61±0.10a	7.17±0.09ab
N₃P₂K₂	29.83±0.27ab	87.67±0.25a	31.63±1.68a	5.67±0.17a	7.37±0.05a
N₁P₁K₂	29.29±0.45b	87.27±1.09a	30.23±0.37b	5.62±0.16a	7.13±0.05ab
N₁P₂K₁	29.37±0.32ab	87.43±1.35a	30.33±0.77b	5.69±0.03a	7.10±0.08b
N₂P₁K₁	30.02±0.58ab	87.30±0.83a	30.57±1.23ab	5.72±0.20a	7.17±0.17ab

处理	单铃质量/g	成铃数/(个/株)	衣分/%	皮棉产量/(kg/hm²)
N₀P₀K₀	4.00d	4.76b	41.70a	605.49c
N₀P₂K₂	4.08cd	6.30ab	42.09a	834.83bc
N₁P₂K₂	4.51ab	7.40ab	41.49a	1062.22abc
N₂P₀K₂	4.57ab	8.27a	41.29a	1158.13ab
N₂P₁K₂	4.78ab	8.78a	40.56a	1312.14ab
N₂P₂K₂	4.80ab	9.68a	40.55a	1443.35a
N₂P₃K₂	4.74ab	8.58a	40.39a	1246.10ab
N₂P₂K₀	4.66ab	7.90ab	40.86a	1146.52ab
N₂P₂K₁	4.63ab	8.63a	40.43a	1234.89ab
N₂P₂K₃	4.65ab	9.12a	40.53a	1287.60ab
N₃P₂K₂	4.88a	8.73a	40.47a	1307.99ab
N₁P₁K₂	4.41bc	7.30ab	40.99a	999.92abc
N₁P₂K₁	4.54ab	7.27ab	41.97a	1083.29abc
N₂P₁K₁	4.72ab	8.07ab	41.23a	1204.00ab

处理	单铃质量/g	成铃数/(个/株)	衣分/%	皮棉产量/(kg/hm²)
N₀P₀K₀	4.00d	4.76b	41.70a	605.49c
N₀P₂K₂	4.08cd	6.30ab	42.09a	834.83bc
N₁P₂K₂	4.51ab	7.40ab	41.49a	1062.22abc
N₂P₀K₂	4.57ab	8.27a	41.29a	1158.13ab
N₂P₁K₂	4.78ab	8.78a	40.56a	1312.14ab
N₂P₂K₂	4.80ab	9.68a	40.55a	1443.35a
N₂P₃K₂	4.74ab	8.58a	40.39a	1246.10ab
N₂P₂K₀	4.66ab	7.90ab	40.86a	1146.52ab
N₂P₂K₁	4.63ab	8.63a	40.43a	1234.89ab
N₂P₂K₃	4.65ab	9.12a	40.53a	1287.60ab
N₃P₂K₂	4.88a	8.73a	40.47a	1307.99ab
N₁P₁K₂	4.41bc	7.30ab	40.99a	999.92abc
N₁P₂K₁	4.54ab	7.27ab	41.97a	1083.29abc
N₂P₁K₁	4.72ab	8.07ab	41.23a	1204.00ab