Yield and Yield Components of Hybrid Rice as Influenced by Nitrogen Fertilization at Different Eco-Sites

Li, Ganghua; Zhang, Jun; Yang, Chongdang; Song, Yunpan; Zheng, Chengyan; Liu, Zhenghui; Wang, Shaohua; Tang, She

doi:10.1080/01904167.2013.859695

Cited by 18 publications

(11 citation statements)

References 19 publications

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“…Previous studies have reached different conclusions on yield-related parameters (number of spikelets per panicle, grain filling percentage, and grain weight), which either increased ( Jian et al 2014 ), were not affected ( Mandana et al 2014 ), or even decreased ( Li et al 2014 ), following the application of N fertilizer. These phenomena might be explained by our experimental results.…”

Section: Discussionmentioning

confidence: 94%

Effects of nitrogen and tiller type on grain yield and physiological responses in rice

et al. 2017

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Tillering is an important agronomic trait for rice population quality and grain production. Nitrogen fertilizer application increased the number of rice tillers, but not every tiller contributes equally to the overall yield. Heterogeneity in tiller yield of rice increased with increasing nitrogen levels. Typically, late emerging tillers contributed less to the grain yield. Under high nitrogen conditions, most of the nutrients were retained in the straw of late emerging tillers; these tillers have high transport efficiency in vascular bundles, but there is less time for nutrients to transport into the grain. Despite the high light intensity, less than half of the light is used for photosynthesis in late emerging tillers. The low activity of enzymes related to grain filling in late emerging tillers is another reason for low yield.

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Section: Discussionmentioning

confidence: 94%

Effects of nitrogen and tiller type on grain yield and physiological responses in rice

et al. 2017

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“…Canopy light interception (LI) was measured with a line ceptometer (Accu PAR LP-80, Decagon Devices Inc.) according to Zhu et al (2016) and expressed as extinction coefficient (K), where. K = [-ln (light intensity below canopy-light intensity above canopy)/LAI] (Li et al, 2014). Net assimilation rate (NAR) was calculated as [(ln LAI 2…”

Section: Measurementsmentioning

confidence: 99%

Optimization of leaf properties and plant phenotype through yield‐based genetic improvement of rice over a period of seventy years in the Yangtze River Basin of China

Zhu

Ren

Liu

et al. 2020

Food and Energy Security

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Knowledge of changes associated with the progression of growth‐related characteristics in rice plant is essential to make strategies for future breeding and crop management. However, thus far, little attention has been given to the identification of temporal changes of the traits concomitant with the year of release in rice genetic breeding. The objective of this study was to explore genetic gain for yield accrued in association with evolution of the growth phenotypes in a 2‐year field experiment conducted on the Yangtze River Basin of China. Fifteen rice (Oryza sativa L.) cultivars, including 5 super high‐yielding rice, bred or widely cultivated from 1936 to 2005, were grown in irrigated field conditions with appropriate doses of commercial fertilizers during the rice‐growing season from May to October in 2013 and 2014. In both years, SPAD reading was high during vegetative and early grain filling stages, but it declined sharply at maturity. In general, SPAD reading increased with the progression in year of release of the cultivars and it correlated with yield benefit accrued. Similar to SPAD, the evolutionary trend also accounted for significant increases in LAI (leaf area index) and SLW (specific leaf weight), CGR (crop growth rate), LAD (leaf area duration), S/LA (spikelets/leaf area), and NAR (net assimilation rate). All growth parameters, except NAR, correlated positively with grain yield. Conversely, K (extinction coefficient) exhibited significant decline along with year of release, meaning more erect canopies. Gain of SLW in the newer cultivars enabled better light energy interception probably with higher RUE, which associated with increased SPAD amounting to low K values. It was opined that the reduced K improved light distribution across the leaves, which contributed to a grain yield advantage through increase of sink size (S/LA) over the 70‐year period.

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“…Dapat diartikan padi hibrida sangat efisien dalam menggunakan pupuk N yang ditambahkan. Respon kuadratik hasil gabah dan jumlah gabah per malai padi hibrida terhadap perlakuan N juga dihasilkan oleh Li et al (2014) dengan hasil gabah maksimun 10 t/ha pada pemupukan N 195 kg/ha di Nanjing dan 18 t/ha pada pemupukan 375 kg N/ha di Tooyuan.…”

Section: Respon Padi Hibrida Terhadap Pemupukan Nunclassified

Verifikasi Dosis Rekomendasi Pemupukan Hara Spesifik Lokasi untuk Padi Varietas Hibrida

Suyamto

Saeri

Saraswati

et al. 2016

j. penelit. pertan. tanam. pangan

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ABSTRACT. IAARD in collaboration with IRRI has developed site specific nutrient management (SSNM or PHSL) recommendation, which can be accessed through PHSL-web (http:/webapps.irri.org/ nm/id ABSTRAK.Badan Litbang Pertanian bekerja sama dengan IRRI telah mengembangkan rekomendasi pemupukan hara spesifik lokasi (PHSL) yang dapat diakses melalui website (http:/webapps.irri.org/ nm/id). Rekomendasi PHSL telah diuji pada padi inbrida namun belum diuji pada padi hibrida. Penelitian ini mengevaluasi rekomendasi PHSL untuk mengetahui respon tanaman padi hibrida terhadap pemupukan N (urea). Penelitian dilakukan pada musim kemarau 2012 di Blitar dan Malang. Penelitian pertama mengevaluasi (1) perlakuan rekomendasi PHSL padi hibrida untuk varietas hibrida Mapan-P05, (2) sama dengan perlakuan 1 untuk varietas hibrida Hipa-10, (3) sama dengan perlakuan 1 untuk varietas inbrida Ciherang, (4) rekomendasi PHSL padi inbrida untuk varietas hibrida Mapan-P05, (5) sama dengan perlakuan 4 untuk varietas hibrida Hipa-10, dan (6) sama dengan perlakuan 4 untuk varietas inbrida Ciherang. Rekomendasi PHSL untuk padi hibrida adalah 300 kg Phonska + 376 kg urea/ha diberikan empat kali, dan rekomendasi PHSL untuk padi inbrida 200 kg Phonska + 332 kg urea/ha diberikan tiga kali. Penelitian menggunakan rancangan acak lengkap, luas plot 5 m x 10 m, empat ulangan. Penelitian kedua dengan rancangan petak terpisah, luas petak 5 m x 10 m, empat ulangan. Petak utama adalah empat perlakuan dosis urea (0, 150, 300, 450 kg/ha) dan anak petak adalah dua varietas (hibrida Mapan-P05 dan inbrida Ciherang). Hasil analisis tanah sebelum penelitian, hasil padi, dan respon padi hibrida terhadap pupuk N merupakan data utama yang dikumpulkan. Hasil penelitian menunjukkan bahwa rekomendasi PHSL padi hibrida kurang tepat. Hal ini karena dengan dosis dan waktu pemberian pupuk NPK yang lebih tinggi, hasil padi hibrida ternyata sama dengan dosis dan waktu pemberian pupuk yang lebih rendah atau rekomendasi pupuk untuk padi inbrida. Respon padi hibrida terhadap pempukan N lebih tinggi dibanding padi inbrida. Artinya, pada dosis pupuk N yang sama mampu memberikan hasil lebih tinggi dibanding padi inbrida. Dapat disimpulkan bahwa padi hibrida tidak memerlukan dosis dan waktu aplikasi pemupukan yang lebih tinggi seperti yang direkomendasikan oleh PHSL-web. Pada dosis pupuk yang sama, padi hibrida memberikan hasil lebih tinggi dibanding padi inbrida, yang berarti efisiensi pemupukan lebih tinggi. Tingkat hasil padi hibrida tidak hanya ditentukan oleh pemberian pupuk, namun juga oleh faktor lain, kualitas benih, dan faktor lingkungan. Terdapat indikasi interaksi G x E x M pada padi hibrida, yang bermakna varietas hibrida memerlukan lingkungan tumbuh yang spesifik.Kata kunci: Padi hibrida, pupuk, efisiensi.

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Yield and Yield Components of Hybrid Rice as Influenced by Nitrogen Fertilization at Different Eco-Sites

Cited by 18 publications

References 19 publications

Effects of nitrogen and tiller type on grain yield and physiological responses in rice

Effects of nitrogen and tiller type on grain yield and physiological responses in rice

Optimization of leaf properties and plant phenotype through yield‐based genetic improvement of rice over a period of seventy years in the Yangtze River Basin of China

Verifikasi Dosis Rekomendasi Pemupukan Hara Spesifik Lokasi untuk Padi Varietas Hibrida

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