Detection of brown planthopper infestation based on SPAD and spectral data from rice under different rates of nitrogen fertilizer

Huang, Jianrong; Sun, Jiayi; Liao, Huaijian; Liu, Xiangdong

doi:10.1007/s11119-014-9367-4

Cited by 24 publications

(19 citation statements)

References 34 publications

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“…The SPAD value and photosynthetically active radiation (PAR) are key determinants for plant growth and development. The SPAD value represents chlorophyll content in rice leaves and indirectly reflects the photosynthetic capacity of plants [25][26][27]. Numerous studies have reported that the accumulated biomass of plants is closely related to the amount of photosynthetically active radiation intercepted by the canopy [28][29][30][31].…”

Section: Discussionmentioning

confidence: 99%

Effect of the Applied Fertilization Method under Full Straw Return on the Growth of Mechanically Transplanted Rice

Tang

Zhang

et al. 2020

Plants

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This study aimed to improve nitrogen utilization and alleviate the inhibition of straw decomposition during early tillering and the growth of paddy after straw return. Specifically, three different nitrogen fertilizer (base fertilizer) application methods were tested under full straw return: applying the compound fertilizer once (J1), applying the compound fertilizer twice (J3) and applying the ammonium carbonate fertilizer plus compound fertilizer (J2). Full straw return without fertilizer (CK1) and no straw return without fertilizer (CK2) were used as the controls. The results showed that treatment with ammonium carbonate fertilizer combined with compound fertilizer (J2) significantly enhanced straw decomposition, light interception and dry matter accumulation at an early stage of tillering, but reduced tiller occurrence at a late tillering stage. Grain yield was affected due to reduced dry matter accumulation, nitrogen use efficiency and number of effective panicles. There were no significant differences in rice growth, nitrogen use efficiency and grain yield between the one-time or two-time compound fertilizer application methods. In contrast, treatment with ammonium carbonate fertilizer combined with compound fertilizer (J2) under full straw return effectively improved straw decomposition and accelerated the return of green and tillering. In addition, the proportion of ammonium carbonate fertilizer affected the nutrient utilization efficiency and yield at later stages.

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Section: Discussionmentioning

confidence: 99%

Effect of the Applied Fertilization Method under Full Straw Return on the Growth of Mechanically Transplanted Rice

Tang

Zhang

et al. 2020

Plants

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“…On the other hand, SPAD values of flag leaf are one index closely related with N content of leaf. Many reports found photosynthesis and grain yield could be affected by the SPAD value of flag leaf at grain filling stage (Ramesh et al, 2002;Jiang et al, 2012;Huang et , and it was reported that the reasonable SPAD value could improve yield, but it varied in different rice varieties. In this study, the SPAD value of flag leaf was about 27-34 at grain filling stage in early rice, and 32-36 in late rice.…”

Section: Discussionmentioning

confidence: 99%

Estimating Grain Yield Based on BSW and SPAD at Grain Filling Stage in Double Rice Cropping System of China

Liu¹,

Li²,

PaoLan³

et al. 2016

IJAB

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It may be good to estimate rice yield based on root bleeding snap weight (BSW) and leaf soil plant analysis development (SPAD) at grain filling stages in southeast China. There were seven treatments: (N-butyl) thiophosphoric triamide (NBPT) applied at rates of 0.00, 0.50, 0.75, 1.00, 1.25, 1.50% with urea @ 135 kg N ha -1 and CK (no NBPT or urea). All treatments received 75 kg P2O5 ha -1 (superphosphate, P2O5 12%) and 150 kg K2O ha -1 (potassium sulfate, K2O 60%), and then all fertilizer and inhibitor were applied once as base fertilizer. At grain filling stage, both of early and late rice, root BSW and leaf SPAD readings were obtained and grain yield determined at harvesting. In addition, the relationship between BSW, SPAD and grain yield was established. The results showed that the grain yield of rice, root BSW and leaf SPAD were increased significantly in application of NBPT with urea. Compared with 0% NBPT, grain yield, BSW and SPAD in 1.00% NBPT were improved by11.9-33.0%, 7.1-74.3% and 4.6-31.7% in early rice; and increased by 8.4-33.0%, 7.9-75.0% and 4.4-19.5% in late rice. However, these decreased when NBPT was less or more than 1.00%. On the other hand, the relationship between BSW, SPAD at grain filling stage and grain yield could be fitted by two-variable linear equation (p<0.05); and which provided better of validation experiment. Therefore, the grain yield could be predicted better by BSW and SPAD at grain filling stage in double rice cropping system.

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“…Another approach to detecting BPH infestation is based on SPAD (Special Products Analysis Division) reading and reflectance of the rice. The results in [9,21] show that SPAD reading and reflectance from rice are significantly effected by BPH infestation. The spectral reflectance from rice canopy significantly decreased in the near-infrared wavelength range as BPH infestations increased.…”

Section: Related Workmentioning

confidence: 97%

Counting Brown Planthoppers in Light-Trap Images Using Morphological Operations

Tran¹,

Tran²,

Long³

et al. 2019

EAI Endorsed Transactions on Context-aware Systems and Applicat

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As brown plant hopper (BPH) is one of the most dangerous kinds of insect for rice plant, in recent years, there has been increased concern in counting them in light trap images to control their spread in order to reduce their damage on rice plant. This paper proposes an approach to counting BPHs in light trap images based on morphological operations. By applying these operations appropriately, combined with some noise removal techniques based on color, BPHs in the light trap images can be identified. In addition, it is common that the BPHs in the light-trap images are overlapped due to the layout of the light trap. Therefore, an approach to counting the overlapped BPHs based on their size is also introduced while the sequential region labeling algorithm is used to count the number of the separate BPHs. The experimental results show that our proposed approach is suited to identifying and counting the BPHs in images which are overlapped.

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Detection of brown planthopper infestation based on SPAD and spectral data from rice under different rates of nitrogen fertilizer

Cited by 24 publications

References 34 publications

Effect of the Applied Fertilization Method under Full Straw Return on the Growth of Mechanically Transplanted Rice

Effect of the Applied Fertilization Method under Full Straw Return on the Growth of Mechanically Transplanted Rice

Estimating Grain Yield Based on BSW and SPAD at Grain Filling Stage in Double Rice Cropping System of China

Counting Brown Planthoppers in Light-Trap Images Using Morphological Operations

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