NPK Fertilization Optimized for Cultivating Chili Peppers for Processing
-
摘要:
目的 研究氮、磷、钾不同施肥量配比对加工型辣椒产量和品质的影响,明确加工型辣椒高产、优质的氮、磷、钾适宜施用量配比,为加工型辣椒合理施肥提供依据。 方法 采用氮、磷、钾三因素二次饱和D-最优设计,以加工型辣椒品种明椒9号为供试材料,建立氮、磷、钾施肥量编码值与产量、加工品质的效应函数。 结果 氮、磷、钾肥对辣椒产量和加工品质的影响显著,均表现为钾肥>磷肥>氮肥,表明钾是影响辣椒产量和加工品质的重要因素。单因子效应分析表明,当氮、磷、钾肥的最高施用量分别为151.10、59.28、306.78 kg·hm−2时,辣椒产量达到最高;当氮、磷、钾肥的最高施用量分别为148.59、59.34、291.66 kg·hm−2时,辣椒加工品质达到最佳。互作效应中,氮磷、氮钾、磷钾互作对辣椒产量和加工品质影响显著,两者配施对辣椒产量和加工品质的提高具有较强的促进作用。模型寻优表明,辣椒产量超过29000 kg·hm−2,在95%置信区间,氮、磷、钾肥适宜施用量分别为109.24~174.43 、44.40~78.95 、213.85~287.95 kg·hm−2;辣椒品质综合评分在80分以上,在95%置信区间,氮、磷、钾肥适宜施用量分别为63.08~115.23、 42.26~72.50 、211.23~292.23 kg·hm−2。 结论 辣椒产量达29000 kg·hm−2、加工品质综合评分达80分以上的施肥方案为氮肥109.24~115.23 kg·hm−2,磷肥44.40~72.50 kg·hm−2,钾肥213.85~287.95 kg·hm−2,适宜的氮、磷、钾肥施用量比例约为1.00~1.05∶0.41~0.6∶1.96~2.64。 Abstract:Objective NPK fertilization to maximize the yield and quality of chili peppers for processing was formulated. 【Method】 An experiment of quadratic saturation D-optimal design with three factors of nitrogen, phosphorus, and potassium was applied to optimize the formulation targeted to maximize the yield and quality of Mingjiao 9 chili peppers for further processing. Result Significant effects on chili pepper yield and processing quality were found to be K>P>N. The optimal amount of N, P2O5, K2O was 151.10, 59.28, 306.78 kg·hm−2 to reach the greatest yield, and 148.59, 59.34, 291.66 kg·hm−2 to achieve the most desirable quality. The combinations of N and P, N and K, and P and K also exerted significant enhancing effects on the chili pepper yield and quality. The optimized fertilizations with a predicted yield exceeding 29,000 kg·hm−2 at 95% confidence level called for the application N, P2O5, and K2O at 109.24–174.43 kg·hm−2, 44.40–78.95 kg·hm−2, and 213.85–287.95 kg·hm−2, respectively, while for a score above 80 on overall chili pepper quality, the application of 63.08–115.23 kg·hm−2, 42.26–72.50 kg·hm−2, and 211.23–292.23 kg·hm−2, respectively, were determined. Conclusion Experimentally optimized NPK fertilizations for chili pepper cultivation to provide a yield of 29000 kg·hm−2 and a quality score of 80 or higher were formulated. To accomplish the goal on yield as well as quality, the formulation would include the ranges of 109.24–115.23 kg·hm−2 on N, 44.40–72.50 kg·hm−2 on P2O5, and 213.85–287.95 kg·hm−2 on K2O with a N∶P2O5∶K2O ratio of 1–1.05∶0.41–0.6∶1.96–2.64. -
Key words:
- Chili peppers /
- nitrogen, phosphorus, and potassium /
- yield /
- processing quality
-
表 1 辣椒各处理编码值及施用量
Table 1. Codes and NPK applications
处理
TreatmentX1(N) X2(P2O5) X3(K2O) 编码
Code用量
Dosage/(kg·hm−2)编码
Code用量
Dosage/(kg·hm−2)编码
Code用量
Dosage/(kg·hm−2)1 −1 0 −1 0 −1 0 2 1 250 −1 0 −1 0 3 −1 0 1 150 −1 0 4 −1 0 −1 0 1 350 5 −1 0 0.1925 89.44 0.1925 208.69 6 0.1925 149.06 −1 0 0.1925 208.69 7 0.1925 149.06 0.1925 89.44 −1 0 8 −0.2912 88.60 1 150 1 350 9 1 250 −0.2912 53.16 1 350 10 1 250 1 150 −0.2912 124.04 表 2 各处理对辣椒产量和加工品质的影响
Table 2. Effects of treatments on chili pepper yield and quality
处理
Treatment产量
Yield/
(kg·hm−2)二氢辣椒素
Dihydrocapsaicin /
(g·hg−1)辣椒素
Capsaicin /
(g·hg−1)辣椒素总量
Total capsaicin/
(g·hg−1)色价
Color valence脂肪含量
Fat content /
(g·hg−1)含水量
Water
content/%综合评分
Comprehensive score1 20123.50±820.47 0.19±0.01 0.22±0.02 0.45±0.02 3.77±0.09 6.15±0.11 70.22±1.86 39.75±0.61 2 25902.30±1055.86 0.39±0.02 0.61±0.01 1.11±0.04 5.91±0.11 6.53±0.15 75.51±1.92 61.53±0.75 3 21987.05±601.29 0.30±0.01 0.41±0.02 0.79±0.03 4.84±0.06 7.62±0.15 72.48±1.93 52.59±0.17 4 27822.00±837.93 0.46±0.01 0.88±0.02 1.50±0.02 4.65±0.07 6.72±0.11 73.66±1.80 67.55±0.88 5 29013.90±810.04 0.67±0.01 0.93±0.04 1.78±0.06 6.41±0.09 7.31±0.11 73.26±1.76 81.43±1.19 6 29899.60±1067.01 0.73±0.01 1.19±0.02 2.13±0.04 6.09±0.10 7.54±0.14 72.73±1.54 89.35±0.93 7 27110.70±883.39 0.52±0.02 0.74±0.02 1.40±0.03 6.41±0.10 7.26±0.12 71.64±1.67 71.91±0.60 8 26808.10±1330.56 0.56±0.01 0.89±0.02 1.60±0.04 4.64±0.09 6.67±0.15 74.34±1.83 70.94±1.03 9 30569.60±1119.88 0.80±0.02 1.30±0.04 2.34±0.05 7.17±0.14 6.88±0.20 73.84±1.30 96.34±1.44 10 23929.000±981.05 0.36±0.01 0.46±0.02 0.91±0.03 4.37±0.13 7.04±0.18 73.25±1.76 53.47±0.15 表 3 产量和加工品质方程偏回归系数检验
Table 3. Partial regression coefficients of yield and quality equations
参数
Parameter偏回归系数
Partial regression coefficientt值
t value显著性水平
Significance方差膨胀因子
VIF产量
Yield加工品质
Processing quality产量
Yield加工品质
Processing quality产量
Yield加工品质
Processing quality截距 Intercept 30822.017 93.483 59.047 199.983 0.000 0.000 − X1 655.440 3.672 2.927 18.308 0.008 0.000 1.131 X2 −1265.803 −6.386 −5.652 −31.842 0.000 0.000 1.131 X3 2215.376 11.588 9.892 57.678 0.000 0.000 1.131 X12 −1569.477 −9.730 −3.634 −25.157 0.002 0.000 1.121 X22 −3020.269 −15.294 −6.993 −39.542 0.000 0.000 1.121 X32 −1471.052 −8.677 −3.406 −22.433 0.003 0.000 1.121 X1X2 −1398.832 −8.847 −5.251 −37.083 0.000 0.000 1.186 X1X3 −835.128 1.627 −3.135 6.821 0.005 0.000 1.186 X2X3 −798.746 −3.963 −2.998 −16.609 0.007 0.000 1.186 表 4 辣椒产量超过29000 kg·hm2的因素取值频率分布
Table 4. Frequency distribution of factors for chili pepper yield higher than 29000 kg·hm-2
变量因子
Variable factorX1 X2 X3 次数
Count频率
Frequency次数
Count频率
Frequency次数
Count频率
Frequency编码值
Code−1 3 0.12 5 0.20 0 0.00 −0.2912 7 0.28 10 0.40 5 0.20 0.1925 8 0.32 10 0.40 9 0.36 1 7 0.28 0 0.00 11 0.44 加权平均值 Weighted average 0.1401 −0.2395 0.4511 标准差 Standard deviation 0.6456 0.4400 0.5241 95%置信区间 95% confidence interval −0.1261~0.3954 −0.4080~0.0526 0.2220~0.6454 施肥方案 Fertilization scheme/(kg·hm−2) 109.24~174.43 44.40~78.95 213.85~287.95 表 5 辣椒加工品质综合评分超过80分的因素取值频率分布
Table 5. Frequency distribution of factors for chili pepper quality score above 80
变量因子
Variable factorX1 X2 X3 次数
Count频率
Frequency次数
Count频率
Frequency次数
Count频率
Frequency编码值
Code−1 3 0.13 5 0.22 0 0 −0.2912 8 0.35 8 0.35 5 0.22 0.1925 9 0.39 10 0.43 8 0.35 1 3 0.13 0 0 10 0.43 加权平均值 Weighted average 0.3083 0.3565 0.3565 标准差 Standard deviation 0.4824 0.0972 0.1116 95%置信区间 95% confidence interval −0.4954~−0.0782 −0.4365~−0.0334 0.2070~0.6698 施肥方案 Fertilization scheme/(kg·hm−2) 63.08~115.23 42.26~72.50 211.23~292.23 -
[1] 刘林娅, 黄亚成, 杨那, 等. 81份辣椒种质资源表型性状的遗传多样性分析 [J]. 热带作物学报, 2023, 44(4):706−715. doi: 10.3969/j.issn.1000-2561.2023.04.006LIU L Y, HUANG Y C, YANG N, et al. Genetic Diversity of Phenotypic Traits in 81 Capsicum annuum Germplasms [J]. Chinese Journal of Tropical Crops, 2023, 44(4): 706−715. (in Chinese) doi: 10.3969/j.issn.1000-2561.2023.04.006 [2] 李红, 巩雪峰, 陈鑫, 等. 加工辣椒避雨栽培优势及水肥一体化施肥方案初探 [J]. 中国土壤与肥料, 2023, (1):155−162. doi: 10.11838/sfsc.1673-6257.21666LI H, GONG X F, CHEN X, et al. Advantages of rain-shelter cultivation of processed pepper and its integrated fertilization scheme with water and fertilizer [J]. Soil and Fertilizer Sciences in China, 2023(1): 155−162. (in Chinese) doi: 10.11838/sfsc.1673-6257.21666 [3] 吴立东, 刘亚婷, 林淑婷, 等. 生物炭与化肥配施对辣椒产量、品质及肥料利用率的影响 [J]. 中国土壤与肥料, 2023, (8):144−151. doi: 10.11838/sfsc.1673-6257.22396WU L D, LIU Y T, LIN S T, et al. Effects of combined application of biochar and chemical fertilizer on yield, quality and fertilizer utilization of pepper [J]. Soil and Fertilizer Sciences in China, 2023(8): 144−151. (in Chinese) doi: 10.11838/sfsc.1673-6257.22396 [4] 张俊峰, 蒯佳琳, 王晓巍, 等. 氮磷钾配施对戈壁日光温室基质槽培番茄产量和品质的影响 [J]. 西北农林科技大学学报(自然科学版), 2022, 50(8):94−102.ZHANG J F, KUAI J L, WANG X W, et al. Effects of combined application of nitrogen, phosphorus and potassium on yield and quality of tomato cultured with organic substrate in greenhouse [J]. Journal of Northwest A & F University (Natural Science Edition), 2022, 50(8): 94−102. (in Chinese) [5] 李春辉, 赵秀芳, 邵红雨, 等. 氮磷钾配施对藤稔葡萄产量和品质的影响 [J]. 安徽农业科学, 2020, 48(5):168−171,196. doi: 10.3969/j.issn.0517-6611.2020.05.047LI C H, ZHAO X F, SHAO H Y, et al. Effects of N, P, K on the yield and quality of the grap [J]. Journal of Anhui Agricultural Sciences, 2020, 48(5): 168−171,196. (in Chinese) doi: 10.3969/j.issn.0517-6611.2020.05.047 [6] 何立楠, 张荣全, 李文志, 等. 施肥量对“红阳” 猕猴桃产量、品质及氮磷钾含量的影响 [J]. 中国土壤与肥料, 2022, (11):56−62. doi: 10.11838/sfsc.1673-6257.21570HE L N, ZHANG R Q, LI W Z, et al. Effect of fertilization amount on yield, quality and NPK of “Hongyang” kiwifruit [J]. Soil and Fertilizer Sciences in China, 2022(11): 56−62. (in Chinese) doi: 10.11838/sfsc.1673-6257.21570 [7] 孟亮, 张文明, 邱晓丽, 等. 水肥一体化技术对辣椒干物质积累及养分吸收规律的影响 [J]. 水土保持通报, 2017, 37(5):290−296.MENG L, ZHANG W M, QIU X L, et al. Effect of fertigation technology on dry matter accumulation and nutrient absorption in pepper [J]. Bulletin of Soil and Water Conservation, 2017, 37(5): 290−296. (in Chinese) [8] 陈芬, 余高, 陈容, 等. 减磷配施有机肥对辣椒生长及光合荧光特性的影响 [J]. 西北农林科技大学学报(自然科学版), 2021, 49(7):114−125.CHEN F, YU G, CHEN R, et al. Effects of reduced application of chemical phosphorus combined with organic fertilizer on growth and photosynthetic fluorescence characteristics of Capsicums annuum L. [J]. Journal of Northwest A & F University (Natural Science Edition), 2021, 49(7): 114−125. (in Chinese) [9] 孙权, 郭鑫年, 李建设, 等. 宁夏引黄灌区日光温室辣椒高产施肥量及配比研究 [J]. 西北农业学报, 2010, 19(4):110−114. doi: 10.3969/j.issn.1004-1389.2010.04.025SUN Q, GUO X N, LI J S, et al. Optimum application amount and ratio of fertilizers for high yield of hot pepper in greenhouse of Ningxia [J]. Acta Agriculturae Boreali-occidentalis Sinica, 2010, 19(4): 110−114. (in Chinese) doi: 10.3969/j.issn.1004-1389.2010.04.025 [10] 尹胜鑫, 周祺, 濮永赛, 等. 保山市冬早大棚辣椒氮磷钾肥料优化施用 [J]. 中国土壤与肥料, 2017, (3):36−43.YIN S X, ZHOU Q, PU Y S, et al. Optimizing fertilization of NPK on early winter pepper under greenhouse in Baoshan [J]. Soil and Fertilizer Sciences in China, 2017(3): 36−43. (in Chinese) [11] 蒯佳琳, 张俊峰, 张玉鑫, 等. 西北戈壁滩日光温室基质栽培辣椒氮磷钾优化施肥组合研究 [J]. 中国土壤与肥料, 2023, (7):15−22. doi: 10.11838/sfsc.1673-6257.22350KUAI J L, ZHANG J F, ZHANG Y X, et al. Study on the optimal fertilization combination of N, P and K for substrate-cultivated pepper in solar greenhouse in the northwest Gobi Desert [J]. Soil and Fertilizer Sciences in China, 2023(7): 15−22. (in Chinese) doi: 10.11838/sfsc.1673-6257.22350 [12] 白厚义, 肖俊璋. 试验研究及统计分析[M]. 西安: 世界图书出版公司, 1998:274-275. [13] 杜少平, 马忠明, 薛亮. 氮磷钾配施对砂田西瓜产量和品质的影响 [J]. 植物营养与肥料学报, 2016, 22(2):468−475. doi: 10.11674/zwyf.14320DU S P, MA Z M, XUE L. Effects of combined application of N, P and K on yield and quality of watermelon in gravel-mulched fields [J]. Journal of Plant Nutrition and Fertilizer, 2016, 22(2): 468−475. (in Chinese) doi: 10.11674/zwyf.14320 [14] 聂金, 谭芷, 王军伟, 等. 氮磷钾配施对辣椒产量、品质的影响 [J]. 中国瓜菜, 2021, 34(10):80−87. doi: 10.3969/j.issn.1673-2871.2021.10.014NIE J, TAN Z, WANG J W, et al. Effects of combined application of N, P and K on yield and quality of pepper [J]. China Cucurbits and Vegetables, 2021, 34(10): 80−87. (in Chinese) doi: 10.3969/j.issn.1673-2871.2021.10.014 [15] 韦伟, 高雪, 陈海燕, 等. 氮磷钾配施对贵椒4号产量及品质的影响 [J]. 贵州农业科学, 2010, 38(7):31−34. doi: 10.3969/j.issn.1001-3601.2010.07.010WEI W, GAO X, CHEN H Y, et al. Effects of combined application of N, P and K on yield and quality of Guijiao 4, a pepper variety [J]. Guizhou Agricultural Sciences, 2010, 38(7): 31−34. (in Chinese) doi: 10.3969/j.issn.1001-3601.2010.07.010 [16] 田浩, 王国书, 耿广东, 等. 定植密度与施肥量对遵辣8号果实辣椒素及粗脂肪含量的影响 [J]. 贵州农业科学, 2017, 45(3):53−57. doi: 10.3969/j.issn.1001-3601.2017.03.013TIAN H, WANG G S, GENG G D, et al. Effects of planting density and N, P and K level on capsicin and crude fat content of zunla 8 [J]. Guizhou Agricultural Sciences, 2017, 45(3): 53−57. (in Chinese) doi: 10.3969/j.issn.1001-3601.2017.03.013 [17] 安凡, 赵淼华, 常云妮, 等. 氮磷钾添加对无患子叶片性状和果实产量的影响 [J]. 福建师范大学学报(自然科学版), 2023, 39(1):111−117.AN F, ZHAO M H, CHANG Y N, et al. Effects of nitrogen, phosphorus and potassium addition on leaf traits and fruit yield of Sapindus mukorossi [J]. Journal of Fujian Normal University (Natural Science Edition), 2023, 39(1): 111−117. (in Chinese) [18] LI Z G, ZHANG R H, XIA S J, et al. Interactions between N, P and K fertilizers affect the environment and the yield and quality of satsumas [J]. Global Ecology and Conservation, 2019, 19: e00663. doi: 10.1016/j.gecco.2019.e00663 [19] GAO J, THELEN K D, MIN D H, et al. Effects of manure and fertilizer applications on canola oil content and fatty acid composition [J]. Agronomy Journal, 2010, 102(2): 790−797. doi: 10.2134/agronj2009.0368 [20] 吴红艳, 于淼, 冯健, 等. 解磷生物肥对温室土壤磷有效性及辣椒产量的影响 [J]. 中国农业科技导报, 2023, 25(10):189−197.WU H Y, YU M, FENG J, et al. Effect of phosphorus solubilizing bio-fertilizer on soil phosphorus availability and pepper yield in greenhouse [J]. Journal of Agricultural Science and Technology, 2023, 25(10): 189−197. (in Chinese) [21] 黄科, 刘明月, 吴秋云, 等. 氮磷钾施用量与辣椒产量的相关性研究 [J]. 江西农业大学学报(自然科学), 2002, 24(6):772−776.HUANG K, LIU M Y, WU Q Y, et al. A study on the correlation between combined application of N P K and the yield of hot pepper [J]. Acta Agriculturae Universitis Jiangxiensis, 2002, 24(6): 772−776. (in Chinese) [22] 杜淼鑫, 颉建明, 曹永康, 等. 磷肥对秋冬季节设施辣椒生长及光合特性的影响 [J]. 甘肃农业大学学报, 2019, 54(3):47−53.DU M X, XIE J M, CAO Y K, et al. Effect of phosphate fertilizer on growth and photosynthetic characteristics of pepper in autumn and winter [J]. Journal of Gansu Agricultural University, 2019, 54(3): 47−53. (in Chinese) [23] 张育文, 范子晗, 李顺晋, 等. 基于辣椒产量、磷素累积及土壤磷环境风险的磷肥用量研究 [J]. 中国土壤与肥料, 2022, (5):34−42. doi: 10.11838/sfsc.1673-6257.20762ZHANG Y W, FAN Z H, LI S J, et al. Study on the amount of phosphorus fertilizer based on pepper yield, phosphorus accumulation and soil phosphorus environmental risk [J]. Soil and Fertilizer Sciences in China, 2022(5): 34−42. (in Chinese) doi: 10.11838/sfsc.1673-6257.20762 [24] 马宗桓, 陈佰鸿, 毛娟, 等. 施氮时期对酿酒葡萄叶片氮代谢酶及相关基因表达的影响 [J]. 西北植物学报, 2018, 38(2):298−306. doi: 10.7606/j.issn.1000-4025.2018.02.0298MA Z H, CHEN B H, MAO J, et al. Effects of nitrogen metabolism enzymes and related gene expression in leaves of Vitis vinifera during nitrogen application period [J]. Acta Botanica Boreali-Occidentalia Sinica, 2018, 38(2): 298−306. (in Chinese) doi: 10.7606/j.issn.1000-4025.2018.02.0298 [25] 张帆, 崔云浩, 秦志翔, 等. 减氮和氮硅配施对辣椒产量、营养品质及养分吸收利用的影响 [J]. 西北植物学报, 2023, 43(9):1518−1527.ZHANG F, CUI Y H, QIN Z X, et al. Effect of nitrogen reduction and nitrogen-silica application on yield, nutritional quality and nutrient uptake and utilization of pepper [J]. Acta Botanica Boreali-Occidentalia Sinica, 2023, 43(9): 1518−1527. (in Chinese) [26] ZHU X M, HAN B J. Root water uptake and root nitrogen mass distributions of soybean under different nitrogen and water supply [J]. Interaction Journal of Agriculture and Biology, 2018, 20(1): 52−56. [27] 陈海燕, 高雪, 祝元波, 等. 辣椒氮磷钾肥配施试验 [J]. 贵州农业科学, 2009, 37(7):166−167. doi: 10.3969/j.issn.1001-3601.2009.07.056CHEN H Y, GAO X, ZHU Y B, et al. The effect of different combinations of nitrogen, phosphorus and potassium fertilizer on yield of pepper [J]. Guizhou Agricultural Sciences, 2009, 37(7): 166−167. (in Chinese) doi: 10.3969/j.issn.1001-3601.2009.07.056 [28] 邢素芝, 汪建飞, 姚春芬. 辣椒NPK肥料配施数学模型的研究 [J]. 土壤通报, 2003, 34(3):238−240. doi: 10.3321/j.issn:0564-3945.2003.03.020XING S Z, WANG J F, YAO C F. Mathematics model on fertilizing N, P and K for pepper [J]. Chinese Journal of Soil Science, 2003, 34(3): 238−240. (in Chinese) doi: 10.3321/j.issn:0564-3945.2003.03.020 [29] 李子双, 王薇, 张世文, 等. 氮磷与硅钙肥配施对辣椒产量和品质的影响 [J]. 植物营养与肥料学报, 2015, 21(2):458−466. doi: 10.11674/zwyf.2015.0221LI Z S, WANG W, ZHANG S W, et al. Effect of nitrogen, phosphorus and silicon calcium fertilizer on yield and quality of pepper [J]. Journal of Plant Nutrition and Fertilizer, 2015, 21(2): 458−466. (in Chinese) doi: 10.11674/zwyf.2015.0221 [30] 田艺心, 高凤菊, 曹鹏鹏. 饱和D-最优设计在高蛋白大豆施肥优化中的应用 [J]. 植物营养与肥料学报, 2019, 25(2):343−350. doi: 10.11674/zwyf.18063TIAN Y X, GAO F J, CAO P P. Application of saturated D-optimal design for optimum fertilization in the production of high protein soybean [J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(2): 343−350. (in Chinese) doi: 10.11674/zwyf.18063 [31] 邬刚, 袁嫚嫚, 王家宝, 等. 包膜磷肥对设施辣椒产量、干物质累积和磷肥利用率的影响 [J]. 中国土壤与肥料, 2021, (6):206−211. doi: 10.11838/sfsc.1673-6257.20489WU G, YUAN M M, WANG J B, et al. Effects of coated phosphate fertilizer on yield, dry matter accumulation and phosphate fertilizer utilization efficiency of pepper in greenhouse [J]. Soil and Fertilizer Sciences in China, 2021(6): 206−211. (in Chinese) doi: 10.11838/sfsc.1673-6257.20489 [32] 史建硕, 郭丽, 王丽英, 等. 优化配方施肥对华北地区露地辣椒产量、品质和养分吸收利用的影响 [J]. 中国土壤与肥料, 2022, (2):86−92. doi: 10.11838/sfsc.1673-6257.20608SHI J S, GUO L, WANG L Y, et al. Effects of optimized fertilization on yield, quality, nutrient absorption and utilization of open-field pepper in North China [J]. Soil and Fertilizer Sciences in China, 2022(2): 86−92. (in Chinese) doi: 10.11838/sfsc.1673-6257.20608