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Effect of Different Dosages and Frequency of Zinc Application on Yields, Zinc Concentration, and Uptake of Rice-Wheat Rotation and Changes in Soil Chemical Fractions of Zinc
Communications in Soil Science and Plant Analysis ( IF 1.8 ) Pub Date : 2022-05-05 , DOI: 10.1080/00103624.2022.2072858
P. C. Srivastava 1 , S. P. Pachauri 1 , Anand Pathak 1 , A. K. Shukla 2
Affiliation  

ABSTRACT

Under intensive rice-wheat cropping system (RWCS), the information on the optimum Zn dose and frequency of application is needed for sustainable productivity of the system and maintenance of soil fertility. In a 6-year field study carried out on a sandy loam (Typic hapludoll), the effect of different dosages (0, 2.5, 5.0, 7.5, and 10.0 kg Zn ha−1) and frequency of Zn applications (once, alternate year, and every year) were investigated on yield and Zn nutrition of rice-wheat crops and changes in chemical fractions of Zn in soil. Based on the average grain yields of rice and wheat, it was concluded that application of 7.5 kg Zn ha−1 as zinc sulfate heptahydrate to rice in alternate years was the best practice in a typic hapludoll as it resulted in an average production of 5.67 t of rice grain and 4.53 t of wheat grain ha−1. The practice resulted in a benefit:cost ratio of 14.2: 1 and also helped to maintain the optimum level of Zn in soil. Application of Zn markedly increased the residual Zn fraction in soils. The use of medium (5 kg Zn/ha) and high doses (7.5 and 10.0 kg Zn ha−1) in all years brought a significant increase in water soluble + exchangeable, organically bound, and sesquioxide bound fractions of Zn. Soil application of 7.5 kg Zn ha−1 to alternate year rice crop can be recommended under RWCS on typic hapludoll for higher grain yields, profitability, and maintenance of Zn availability.



中文翻译:

不同施锌量和施锌频率对稻麦轮作产量、锌浓度和吸收及土壤锌化学成分变化的影响

摘要

在集约化稻麦种植系统 (RWCS) 下,为了系统的可持续生产力和保持土壤肥力,需要有关最佳锌剂量和施用频率的信息。在对沙质壤土(典型 hapludoll)进行的为期 6 年的实地研究中,不同剂量(0、2.5、5.0、7.5 和 10.0 kg Zn ha -1)和锌施用频率(一次,隔年)的影响, 和每年) 调查了稻麦作物的产量和锌营养以及土壤中锌化学成分的变化。根据水稻和小麦的平均粮食产量得出结论,施用 7.5 kg Zn ha -1将七水硫酸锌隔年用于水稻是典型单倍体动物的最佳实践,因为它导致平均产量为 5.67 吨稻谷和 4.53 吨小麦谷 ha -1。这种做法产生了 14.2:1 的效益:成本比,也有助于保持土壤中锌的最佳水平。锌的施用显着增加了土壤中的残留锌含量。在所有年份中使用中等剂量(5 kg Zn/ha)和高剂量(7.5 和 10.0 kg Zn ha -1)显着增加了 Zn 的水溶性 + 可交换、有机结合和倍半氧化物结合部分。土壤施用 7.5 kg Zn ha -1在 RWCS 下,可以建议对典型的单倍体稻谷进行隔年种植,以提高谷物产量、盈利能力和维持锌的可用性。

更新日期:2022-05-05
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