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Foliar application of potassium silicate, potassium fulvate and betaine improve summer-time tomato yield by promoting plant nitrogen and potassium uptake

文献类型： 外文期刊

作者： Xu, Xiangnan 1 ; Lei, Xihong 3 ; Liao, Shangqiang 1 ; Li, Yanmei 1 ; Sun, Yanxin 1 ;

作者机构： 1.Minist Agr & Rural Affairs, Key Lab Urban Agr North China, Beijing, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr Resource & Environm, Shuguanghuayuan Mid Rd 9, Beijing, Peoples R China

3.Beijing Agr Tech Extens Stn, Gaoyuan St Jia 2, Beijing, Peoples R China

关键词： biostimulant; leaf spray; Lycopersicon esculentum; macronutrients translocation; tomato fruit quality

期刊名称：FOLIA HORTICULTURAE （ 影响因子：1.934； 五年影响因子：2.021 ）

ISSN： 0867-1761

年卷期：

页码：

收录情况： SCI

摘要： During the summer months, greenhouse tomato production is challenged by the heat, causing yield reduction; therefore, we conducted a study to test the effectiveness of different foliar spray compositions for the improvement of Lycopersicon esculentum var. cerasiforme 'Qianxi' nutrition uptake and fruit yield. Two forms of silicon, two kinds of organic nitrogenous compounds and water as the control factor were two-two paired to become nine different recipes, which were as follows: CK (H2O), ISi (K2SiO3), organic silicon (OSi), potassium fulvate (BSFA), BSFA + ISi, BSFA + OSi, betaine (GB), GB + ISi and GB + OSi. The plants were sprayed three times during the period of the first, second and third truss fruit expansions with a 2-week interval. As a result, BSFA or K2SiO3 generated higher yield in plants compared with the other compositions. Also, K2SiO3 significantly enhanced the total nitrogen, phosphorus and potassium accumulation in fruit and the whole plant. Comparing across the nine recipes, BSFA + ISi, ISi and GB had improved the fruit yield by 17%, 12.7% and 9.5%, performing the best. BSFA + ISi, ISi and GB also improved the plant nitrogen uptake by 8.2%, 18.8% and 9.8%, as well as the potassium uptake by 16.2%, 12.3% and 15.2%, compared with CK, respectively. Thus, K2SiO3, BSFA and GB stimulated the plant nitrogen and potassium uptake, which improved the marketable yield.

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