Growth and Dry Matter Accumulation and Nutrient Utilization Efficiency of Rich Flavor Style Paddy-tobacco

doi:10.7668/hbnxb.20192139

Abstract

Abstract: In order to investigate the growth, dry matter accumulation and nutrient use efficiency of rich flavor style flue-cured tobacco in Hunan paddy-tobacco, case study methods were carried out in two typical paddy-tobacco fields, suitable yield level(2 250-2 700 kg/ha) and high yield level(2 700-3 150 kg/ha), in Chenzhou Guiyang County and Hengyang Leiyang of Hunan Province in 2019. The differences in agronomic traits, leaf area index, root morphology, dry matter accumulation and distribution, nutrient accumulation and distribution, and nutrient utilization efficiency of flue-cured tobacco in different periods were analyzed. The results showed that:The above-ground part of flue-cured tobacco grown well at high yield level, the root system was well developed, the dry matter and N, P, K nutrients accumulated much, the utilization efficiency of N, P, K fertilizer was high, but the proportion of N, P, K nutrients in flue-cured tobacco leaves at suitable yield level was large, N, P, K nutrient harvest index was high. Flue-cured tobacco plants in Leiyang were tall, thick stems, thick roots, the dry matter and nutrient accumulation in roots and stems were higher;The leaf area of flue-cured tobacco in Guiyang County was large, many lateral roots, and the dry matter and nutrition of flue-cured tobacco were more accumulated. In the production of flue-cured tobacco of rice-tobacco rotation, in view of large soil masses and low temperature and rainy weather, it is necessary to mature the soil, cultivate strong seedlings, improve the quality of transplanting, create a good soil environment for the root growth of flue-cured tobacco, and promote the early growth and rapid development of flue-cured tobacco.

Key words: Rich flavor style paddy-tobacco, Growth, Dry matter accumulation, Nutrient utilization efficiency, Case study method

CLC Number:

S572.01

HE Mingyu, XIAO Hanqian, DENG Xiaohua, LI Liangyong, LI Wujin, ZHOU Fumei, CHEN Zhifeng, XIAO Yansong, HUANG Qionghui, HUANG Jie. Growth and Dry Matter Accumulation and Nutrient Utilization Efficiency of Rich Flavor Style Paddy-tobacco[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(4): 139-146. doi: 10.7668/hbnxb.20192139.

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