Chinese yam yield is affected by soil nutrient levels and interactions among N, P, and K fertilizers

IF 4.7 4区 医学 Q1 CHEMISTRY, MEDICINAL
Yang Chen , Xianzhi Zhou , Lina Ma , Yongsheng Lin , Xiangui Huang
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引用次数: 0

Abstract

Objective

The current fertilization methods for Chinese yam are uneconomic and unfriend to environment. A rational one is very important to achieve desired balance of high yield of Chinese yam, economic and friend to environment. Here, we studied the effects of nitrogen (N), phosphorus (P), and potassium (K) fertilizers on the yield of ‘Qinfeng’ Chinese yam in shallow-groove directional cultivation.

Methods

The experiments were conducted in Dehua County, Fujian Province, China using a “3414” optimal design. Overall, three fertilizer factors (N, P, and K) were evaluated at the following four levels: 0, no fertilizer; 1, 0.5-fold the typical rate; 2, typical fertilization rate; and 3, 1.5-fold the typical rate. There were 14 different fertilization treatments.

Results

Treatment 6 (N2P2K2) produced the longest (75.6 cm) and thickest tubers (4.9 cm) with the highest tuber fresh weight (1311.9 g) and yield (41 015.9 kg/hm2), whereas, treatment 1 produced the shortest (65.6 cm) and thinnest tubers (3.9 cm) with the lowest fresh weight (953.4 g) and yield (28 532.8 kg/hm2) among the 14 fertilizer combinations. The experimental data could be fitted to single-variable quadratic and binary quadratic models but not to a ternary quadratic polynomial model. Appropriate N, P, and K fertilizer application rates increased Chinese yam yield. However, excessive fertilization lowered the yield. Chinese yam yield was significantly and strongly correlated with the amounts of N, P, and K fertilizer applied.

Conclusion

Based on the single variable quadratic and binary quadratic models, we propose that the quantities of N, P, and K fertilizer used to grow 1 hm2 ‘Qinfeng’ Chinese yam should be 360–388.3, 90–100.95, and 416.3–675 kg, respectively.

山药产量受土壤养分水平和氮、磷、钾肥相互作用的影响
目的现行山药施肥方法不经济,对环境不友好。合理的调控对实现山药高产、经济、环保的理想平衡至关重要。在浅沟定向栽培条件下,研究了氮肥、磷肥和钾肥对‘秦丰’山药产量的影响。方法采用“3414”优化设计,在福建省德化县进行试验。总体而言,三个肥料因子(N, P和K)在以下四个水平上进行评估:0,不施肥;1、典型率的0.5倍;2、典型受精率;是典型速率的1.5倍。共有14种不同的受精处理。结果处理6 (N2P2K2)的块茎最长(75.6 cm)、最厚(4.9 cm),块茎鲜重最高(1311.9 g),产量最高(41 015.9 kg/hm2);处理1的块茎最短(65.6 cm)、最薄(3.9 cm),鲜重最低(953.4 g),产量最低(28 532.8 kg/hm2)。实验数据可以拟合为单变量二次和二元二次模型,但不能拟合为三元二次多项式模型。适当的氮、磷、钾肥施用量可提高山药产量。但过量施肥降低了产量。山药产量与施氮、磷、钾量呈极显著强相关。结论基于单变量二次和二元二次模型,提出秦丰山药1 hm2的氮磷钾用量为360 ~ 388.3 kg, 90 ~ 100.95 kg, 416.3 ~ 675 kg。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Chinese Herbal Medicines
Chinese Herbal Medicines CHEMISTRY, MEDICINAL-
CiteScore
4.40
自引率
5.30%
发文量
629
审稿时长
10 weeks
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