Effect of crop geometry and nitrogen levels on leaf chlorophyll content of cotton (Gossypium hirsutum) at different growth stages under rainfed Vertisols

Q4 Agricultural and Biological Sciences

Indian Journal of Agronomy Pub Date : 2024-05-05 DOI:10.59797/ija.v69i1.5494

B. B. Nayak, S. Bharathi, M. S. Rekha, And K. Jayalalitha

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引用次数: 0

Abstract

A field experiment was conducted during the rainy (kharif) season of 2018–19 at the Regional Agricultural Research Station, Acharya N.G. Ranga Agricultural University, Lam, Gunter, Andhra Pradesh on Vertisols under rainfed conditions. To study the effect of crop geometry and nitrogen levels on compact cotton (Gossypium hirsutum L.). Leaf chlorophyll content was measured with the Soil Plant Analysis Development meter (SPAD 502 Plus Chlorophyll Meter) at different crop growth stages. Among the various crop geometry studied, maximum chlorophyll (SPAD index) content, functional leaves per square meter and leaf area index (LAI) were recorded with close crop geometry 60 cm × 10 cm. Among nitrogen levels application of 180 kg N/ha recorded maximum chlorophyll content, functional leaves per square meter and LAI. Combined effect on crop geometry and nitrogen levels on chlorophyll content was recorded significant with closer geometry 60cm x10cm along with an application of 180kg N ha-1 at 90 days after sowing. Dry matter accumulation (kg/ha) at 30 DAS, 60 DAS, 90 DAS and at harvest was significantly affected by crop geometry and levels of nitrogen but not by their interaction.

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在雨水灌溉的瘠薄土壤中，不同生长阶段作物的几何形状和氮含量对棉花（Gossypium hirsutum）叶片叶绿素含量的影响

2018-19 年雨季（印度旱季）期间，在安得拉邦冈特拉姆的阿查里亚-N.G. 兰加农业大学区域农业研究站，在雨养条件下的椎质土壤上进行了一项田间试验。研究作物几何形状和氮水平对紧凑型棉花（Gossypium hirsutum L.）的影响。使用土壤植物分析发展仪（SPAD 502 Plus 叶绿素仪）测量了不同作物生长阶段的叶片叶绿素含量。在所研究的各种作物几何形状中，叶绿素（SPAD 指数）含量、每平方米功能叶和叶面积指数（LAI）最高的作物几何形状为 60 厘米×10 厘米。在各种氮肥水平中，施用 180 千克氮/公顷的叶绿素含量、每平方米功能叶片数和叶面积指数最高。在播种后 90 天，如果作物的几何形状为 60 厘米×10 厘米，同时施氮量为 180 千克/公顷，则作物的几何形状和施氮量对叶绿素含量的综合影响显著。30DAS、60DAS、90DAS 和收获时的干物质积累（千克/公顷）受作物几何形状和氮素水平的显著影响，但不受其交互作用的影响。

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

Indian Journal of Agronomy Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

0.50

自引率

0.00%

发文量

期刊介绍： Indian Journal of Agronomy welcomes concise articles presenting original research data based on field experiments on all aspects of agronomy in different crops and related cropping systems. • The journal publishes only full length comprehensive articles based on new approaches/findings in English only. • Review articles are also considered but these are normally solicited by Editorial Board. However, the authors who wish to contribute a review on their own based on their standing in the relevant field may contact the Secretary or Chief Editor with a broad outline before submitting the manuscript.