Enrichment of maize grains with zinc through agronomic biofortification

Q4 Agricultural and Biological Sciences

Journal of the Indian Society of Soil Science Pub Date : 2021-07-30 DOI:10.5958/0974-0228.2021.00030.x

G. G. Kandali, N. Yadav, R. Karmakar, D. Tamuly

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Abstract

A field experiment was conducted at instructional-cum-research farm of Assam Agricultural University, Jorhat, Assam to enrich zinc (Zn) in grains of a hybrid maize variety (PAC 740) through soil application of Zn with six levels of ZnSO4.7H2O viz. 0, 20, 40, 60, 80 and 100 kg ha-1 with and without foliar spray of 0.5% ZnSO4.7H2O at tasseling stage. Highest grain yield (7.83 t ha-1) was recorded with 60 kg ZnSO4.7H2O (soil) + 0.5% foliar spray. Significant increase in grain yield over control was observed at 40 kg ZnSO4.7H2O and above. Foliar application of Zn though improved yield, but statistically had no effect on yield, plant height and number of grains per cob between graded doses of Zn with and without foliar application. However, grain Zn concentration and uptake were more effectively increased by Zn fertilization, especially with soil and foliar applications. Significantly highest grain Zn concentration (46.9 mg kg-1) and uptake of Zn (358.2 g ha-1) was observed with 100 kg ZnSO4.7H2O ha-1 (soil)+0.5% foliar application over control. Nitrogen and potassium concentration and uptake by grains increased with the increasing level of Zn but phosphorus concentration and uptake decreased. Agronomic efficiency and apparent recovery efficiency was found highest in the treatment with 60 kg ZnSO4.7H2O ha-1 (soil)+0.5% foliar application. Soluble protein increased significantly over control with 40 kg ZnSO4.7H2O ha-1 (7.41%) and above. Although, crude protein and starch content increased with the increase in Zn concentration, the effect was not significant with increasing dose of ZnSO4.7H2O.

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农艺生物强化对玉米籽粒锌富集的研究

在阿萨姆邦乔尔赫特阿萨姆邦农业大学的教学兼研究农场，通过抽雄期叶片喷施0.5% ZnSO4.7H2O和不喷施ZnSO4.7H2O 6个浓度(0、20、40、60、80和100 kg ha-1)的土壤施用Zn来提高杂交玉米品种PAC 740籽粒锌的含量。ZnSO4.7H2O(土壤)60 kg + 0.5%叶面喷施籽粒产量最高(7.83 t hm -1)。ZnSO4.7H2O用量为40 kg及以上时，籽粒产量较对照显著增加。叶面施锌虽然提高了产量，但在分级施锌与不施锌之间对产量、株高和每穗轴粒数没有统计学影响。但施用锌能更有效地提高籽粒锌浓度和吸收，尤其是土壤和叶面施锌。施用100 kg ZnSO4.7H2O hm -1(土壤)+0.5%叶面施用时，籽粒Zn浓度(46.9 mg kg-1)和Zn吸收量(358.2 g ha-1)显著高于对照。籽粒氮、钾浓度和吸收随Zn水平的增加而增加，而磷浓度和吸收随Zn水平的增加而降低。60 kg ZnSO4.7H2O hm -1(土壤)+0.5%叶喷处理的农艺效率和表观恢复效率最高。添加40 kg ZnSO4.7H2O ha-1后，可溶性蛋白含量显著高于对照组(7.41%)。粗蛋白质和淀粉含量随Zn浓度的增加而增加，但随ZnSO4.7H2O剂量的增加影响不显著。

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来源期刊

Journal of the Indian Society of Soil Science Agricultural and Biological Sciences-Soil Science

CiteScore

0.80

自引率

0.00%

发文量

期刊介绍： To cultivate and promote soil science and kindred branches of science. To disseminate the knowledge of soil science and its applications, through meetings, discussions, and publications. To promote judicious interactive use of soil, water and other natural resources, fertilizer and other inputs to maintain quality and resilience of soil for sustainable agriculture. To foster high standards in the teaching and education of soil science. To work in close association with learned societies and organizations having similar objectives. To create public awareness about the importance of soil as a finite natural resource. To carry out research and to perform all other acts, matters, and things that may assist in, or be conduce to, or be necessary for the fulfillment of objectives and purposes of the Society.