Chlorophyll meter-based nitrogen management of rice grown under alternate wetting and drying irrigation

Cabangon, R. J.; Castillo, E.; Tuong, To Phuc

doi:10.1016/j.fcr.2010.12.002

Cited by 98 publications

(58 citation statements)

References 22 publications

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“…Then, "UFV-80 color chart" could substitute for SPAD readings in estimating leaf N status in leaf potato plants. These results are in accordance with Cabangon et al (2011), that reported r=0.84, in two years of crops, in rice crops, as well as the results presented by Yang et al (2003). These authors reported that for diagnosing leaf N status in real-time N management, leaf color chart and SPAD readings can be used directly for determining the timing of N topdressing without adjusting for specific leaf weight (dry matter/leaf area), and if leaf color chart or SPAD readings is used to estimate N (per unit dry weight), specific leaf weight has to be considered.…”

Section: Resultssupporting

confidence: 83%

“…This probably occurred due to the higher volume of precipitated rain in the wet season, which may have led to losses of N by leaching. Cabangon et al (2011) reported that for rice crop the critical values of 3 and 3.5 for leaf color chart corresponded SPAD chlorophyll meter readings of 35 and 38, respectively. Furthermore, the foliar color chart as well as the SPAD chlorophyll meter readings can diagnose N nutritional status of the potato in a practical and non-destructive manner.…”

Section: Resultsmentioning

confidence: 99%

“…The most commonly used equipment for the evaluation of N nutritional status in real time are: the analysis of the N-NO 3 content in the sap of the petiole using microelectrode (Brink et al, 2002) and the indicator strip selected for nitrate (Parks et al, 2012). Additionally, SPAD chlorophyll meter readings have been shown to correlate well to laboratory-extracted chlorophyll (León et al, 2007), and to N status in culture of lettuce (Fontes et al, 1997), wheat (Tremblay et al, 2010), potato (Gil et al, 2002;Silva et al, 2009, Busato et al, 2010, tomato (Fontes and Araujo, 2006) and rice (Cabangon et al, 2011). Other equipment have been used as a tool to evaluate N nutritional status are Dualex ® (Coelho et al, 2012) and the digital camera (Li et al, 2010;Wang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Top-dressing nitrogen management decision in potato using the UFV-80 color chart and SPAD readings

Braun¹,

Silva²,

Fontes³

et al. 2015

Afr. J. Agric. Res.

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The chlorophyll meter (SPAD-502) and "UFV-80" color chart can be used to diagnose the nitrogen (N) nutritional status of potato plants to determine the need for fertilizer-N topdressing. The present investigation was focused on how chlorophyll meter and "UFV-80" color chart help in determining optimal N management through real time N application for improving yield and profitable rate in potato crop. The experiments, in two planting seasons (dry and wet), were carried out a split-plot design in a randomized complete blocks with four repetitions. In the whole plot, five N fertilization rates (0, 50, 100, 200 and 300 kg ha -1 of N) were applied before planting. In the half of plot area, N fertilization rates (42, 152, 152, 152 and 152 kg ha -1 of N at dry season and 133, 93, 69, 58 and 205 kg ha -1 of N in wet season) were or did not applied in top-dressing, depending on the UFV-80 color chart reading and SPAD chlorophyll meter reading in the terminal leaflet of the fourth leaf, at 21 day after the plant emergency (DAE). At 77 and 70 DAE for the dry and wet seasons, respectively, the plants were harvested to determine the commercial tuber yield. The SPAD chlorophyll meter reading and "UFV-80" color chart can be used to determine N nutritional status in potato crops in both planting seasons. Both planting seasons, the commercial production was not influenced by the N fertilization rates in pre-planting and top-dressing.

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Top-dressing nitrogen management decision in potato using the UFV-80 color chart and SPAD readings

Braun¹,

Silva²,

Fontes³

et al. 2015

Afr. J. Agric. Res.

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“…3, Table 3) and the leaf N concentration in sweet sorghum 31 was used as an indicator to decide the timing of fertilizer topdressing for satisfying the crop demand for N and minimizing N loss in the crop cultivation systems 5,32 . In the present study, it was difficult to define a fixed SPAD reading for the timing of fertilizer topdressing due to the different trends in SPAD readings during the growing seasons in both years (Fig.…”

Section: Effect Of N Input On Sweet Sorghum Productivitymentioning

confidence: 99%

Effects of Nitrogen Application on Sweet Sorghum (Sorghum bicolor (L.) Moench) in the Semi-Arid Tropical Zone of India

Uchino

Watanabe

Ramu

et al. 2013

JARQ

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“…Instrumen untuk mengukur spektrum pemantulan, yaitu klorofil meter (Lin et al 2010;Cabangon et al 2011), multi-spektral sensor (Reyniers et al 2006), dan kamera digital komersial Sakamoto et al 2011), digunakan dalam pertanian presisi untuk memantau pertumbuhan, mendiagnosis status N, dan pengelolaan tanaman spesifik lokasi. Singh et al (2002) membandingkan penggunaan klorofil meter (SPAD) pada batas kritis 35 dan BWD skala 4 dan 5 terhadap hasil padi di India (Tabel 1).…”

Section: Prinsip Dasar Bagan Warna Daununclassified

Bagan Warna Daun: Alat untuk Meningkatkan Efisiensi Pemupukan Nitrogen pada Tanaman Padi

Erythrina

2016

J. Litbang Pert.

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ABSTRAKNitrogen (N) merupakan unsur hara utama pada tanaman padi, tetapi ketersediaannya terbatas pada hampir semua jenis tanah. Pemberian pupuk N secara berlebihan menyebabkan tanaman berwarna hijau gelap, mudah rebah, serta rentan terhadap hama dan penyakit. Di pihak lain, kekurangan N menyebabkan tanaman tumbuh kerdil, sistem perakaran tidak berkembang, daun menjadi kuning, dan gabah cenderung cepat rontok. Makalah ini mengulas perkembangan penggunaan bagan warna daun (BWD) pada tanaman padi sawah, mencakup cara dan manfaat penggunaannya dalam meningkatkan hasil gabah, menekan serangan hama dan penyakit tanaman, serta memperbaiki kondisi lingkungan. Pemberian pupuk N sesuai kebutuhan merupakan kunci dalam memperbaiki pertumbuhan tanaman untuk memperoleh hasil yang optimal. Waktu penggunaan BWD dapat dengan dua cara, yaitu: 1) berdasarkan kebutuhan tanaman, yaitu dengan membandingkan warna daun padi dengan skala warna pada BWD dan 2) berdasarkan waktu yang telah ditetapkan, yaitu pada saat pembentukan anakan aktif (2128 HST) dan primordia (3540 HST). Pemberian N yang berlebihan pada stadia awal pertumbuhan tanaman meningkatkan kerentanan terhadap hama wereng coklat dan penggerek batang serta penyakit blas, sehingga rekomendasi pupuk spesifik lokasi menjadi sangat penting. Gerakan penggunaan BWD secara masif ke depan dapat didukung melalui penggunaan kamera digital atau telepon seluler beresolusi tinggi.

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Chlorophyll meter-based nitrogen management of rice grown under alternate wetting and drying irrigation

Cited by 98 publications

References 22 publications

Top-dressing nitrogen management decision in potato using the UFV-80 color chart and SPAD readings

Top-dressing nitrogen management decision in potato using the UFV-80 color chart and SPAD readings

Effects of Nitrogen Application on Sweet Sorghum (Sorghum bicolor (L.) Moench) in the Semi-Arid Tropical Zone of India

Bagan Warna Daun: Alat untuk Meningkatkan Efisiensi Pemupukan Nitrogen pada Tanaman Padi

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