红芸豆养分限制因子及养分吸收、积累和分配特征研究

Nutrient restrictive factors, nutrient absorption and accumulation of red kidney bean

  • 摘要: 研究红芸豆养分限制因子、植株干物质和氮、磷、钾养分积累及分配规律, 可为红芸豆合理施肥及高产栽培提供理论依据。大田试验条件下, 以‘英国红’红芸豆为试材, 设置缺素试验, 采集全施肥区植株样品, 分析研究红芸豆不同生育时期各器官干物质量、养分含量及积累量。结果显示, 氮磷钾配合全施显著提高红芸豆产量; 缺氮、缺磷、缺钾处理与全施肥处理相比, 产量分别降低14.2%、8.0%和11.3%, 表明影响红芸豆产量的限制因子为氮>钾>磷。在整个生育期, 红芸豆干物质累积速率先升高后降低; 根、茎、荚皮和豆粒干物质累积量呈上升趋势, 叶干物质在收获期有下降趋势, 收获时不同部位干物质量为豆粒>茎≈荚皮>叶片>根。随生育期推进, 茎、叶和荚皮中氮含量呈递减趋势, 豆粒中氮含量呈递增趋势, 而各器官磷、钾含量呈递减趋势。盛花期到结荚期是养分累积最大期, 其氮、磷、钾吸收量分别占整个生育期吸收总量的28.14%、49.22%和56.20%; 不同器官吸收累积氮、磷、钾量不同, 成熟期豆粒、叶、茎和根中均为累积氮最多、钾次之、磷最少, 荚皮中累积钾最多、氮次之、磷最少。每生产100 kg红芸豆需供给N 4.37 kg、P2O5 2.38 kg、K2O 3.53 kg, 比例为1∶0.54∶0.81。

     

    Abstract: With important economical and nutritional values, kidney bean (Phaseolus vuglaris) is one of the main grain crops in China. Recently, the planting area of red kidney bean has been gradually increasing in Shanxi Province, China. However, the nutrient absorption characteristics and limiting factors of kidney bean was still not very clear. Nitrogen (N), phosphorus (P) and potassium (K) are essential nutrients for plant growth, and knowledge on periodic uptake, accumulation and allocation of N, P and K in different organs of kidney bean is important to implement nutrient management practices to ensure its’ sustainable production. There were several studies on effect of the fertilization and nitrogen application on yield of kidney bean. However, few studies have investigated the nutrient accumulation and distribution characteristics of kidney bean. In this study, field experiment was conducted with different nutrient application (N absence, P absence, K absence, NPK application and no fertilizer) using the red kidney bean variety ‘British Red’ as the materials in 2014. The nutrient restrictive factors, dry matter accumulation and nutrient uptake and accumulation of red kidney bean were investigated. The samples of NPK application treatment at different growth stages were collected for determining dry matter and nutrient contents in different organs, to illustrate the law of nutrient absorption. This is beneficial to provide theoretical basis for rational fertilization and high yield cultivation of red kidney bean. The results showed that NPK application treatment significantly increased yield of red kidney bean compared to absence of N, P, or K and no fertilizer treatments. Compared to NPK application treatment, yields of N-, P- or K-absence decreased by 14.2%, 8.0% and 11.3%, respectively, which indicated that the order of nutrient restrictive factors of red kidney bean yield was N > K > P. The dry matter accumulation rate of red kidney bean increased firstly and then reduced in the whole growth period. Dry matter accumulation of root, stem, pod shell and pea increased gradually throughout the whole growing period, while dry matter accumulation of leaf decreased at harvest stage. The order of dry matter weight in different organs at harvest was pea > stem ≈ pod shell > leaf > root. The contents of N, P and K of all investigated organs varied at different stages. N contents in steam, leaf and pod shell decreased gradually, and increased in pea throughout the whole period. The contents of P and K in different organs showed a decreasing trend in whole growth period. The highest nutrients level was observed from full-blooming to pod bearing stage, in which, the absorption contents of N, P and K accounted for 28.14%, 49.22% and 56.20% of the total content of whole growth period, respectively. The accumulation amount of N, P and K in different organs was various. The order of N, P, K accumulation was N > K > P in pods, leaves, stalks and stems, while it was order of K > N > P in pod skins. In conclusion, to produce 100 kilogram kidney bean pea, 4.37 kg N, 2.38 kg P2O5 and 3.53 kg K2O application with ratio of 1∶0.54∶0.81 were needed.

     

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