Improving rice population productivity by reducing nitrogen rate and increasing plant density

Tian, Guangli; Gao, Limin; Kong, Yali; Hu, Xiangyu; Xie, Kailiu; Zhang, Ruiqing; Ling, Ning; Shen, Qirong; Guo, Shiwei

doi:10.1371/journal.pone.0182310

Cited by 76 publications

(46 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the present experiment, applying N fertilizer increased the numbers of tillers and panicles per plant and slightly reduced 1000 grain weight. These finding are consistent with a previous study where N fertilizer had positive effects on the number of spikelets per panicle and number of panicles per unit area, but there were negative effects on filled grain and 1000 grain weight . There was no significant linear correlation between grain weight and anthocyanin content per grain ( R 2 = 0.199, P > 0.05) in our results, suggesting that the reduction in grain weight was not likely to have been related to grain anthocyanin.…”

Section: Discussionsupporting

confidence: 92%

“…These finding are consistent with a previous study where N fertilizer had positive effects on the number of spikelets per panicle and number of panicles per unit area, but there were negative effects on filled grain and 1000 grain weight. 38 There was no significant linear correlation between grain weight and anthocyanin content per grain (R 2 = 0.199, P > 0.05) in our results, suggesting that the reduction in grain weight was not likely to have been related to grain anthocyanin. Flowering time was not a factor in our field trial as all the pigmented rice genotypes were local genotypes that are highly sensitivity to photoperiod.…”

Section: Discussioncontrasting

confidence: 61%

See 1 more Smart Citation

Applying nitrogen fertilizer increased anthocyanin in vegetative shoots but not in grain of purple rice genotypes

et al. 2018

View full text Add to dashboard Cite

Applying N fertilizer could be a promising way to improve the antioxidative properties in vegetative parts for use in rice-grass juice, cosmetics and other products, especially the young leaves, which contained high values of anthocyanin as well as antioxidant capacity. However, further field studies should be undertaken to optimize N utilization for anthocyanin and antioxidant capacity in purple rice genotypes. © 2018 Society of Chemical Industry.

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Discussioncontrasting

confidence: 61%

Applying nitrogen fertilizer increased anthocyanin in vegetative shoots but not in grain of purple rice genotypes

et al. 2018

View full text Add to dashboard Cite

show abstract

“…This region is characterized by a high rate of basal N application and sparse planting (Jin et al, 2005;Su et al, 2012), with high yield loss risk and potential for environmental damage. Previous studies have indicated that increasing planting density, while decreasing basal N application, could benefit rice production and lead to high yields with high N use efficiency (Tian et al, 2017;Zhu, Zhang, Zhang, Deng, & Zhang, 2016). Paddy fields in northeast China, especially in Heilongjiang Province, are mainly irrigated by well water through traditional flooding irrigation.…”

Section: Crop Sciencementioning

confidence: 99%

Improving photosynthetic production in rice using integrated crop management in northeast China

Guo

Hongfang

et al. 2020

Crop Science

View full text Add to dashboard Cite

Integrated crop management practices can improve rice (Oryza sativa L.) grain yield, but the effects of such practices on dry matter accumulation and photosynthetic productivity are inconsistent and not well understood. The primary objective of this study was to investigate the effects of integrated crop management practices on dry matter accumulation and redistribution, photosynthetic production, and yield of rice in northeast China. Medium‐ and high‐yielding potential japonica rice cultivars were grown using four crop management practices, including no N application (N0), local farmers’ cultivation practice (FP), high‐yield cultivation practice (HYP), and super‐high‐yield cultivation practice (SHYP). The increases in average yield with the HYP and SHYP treatments were 16.87 and 36.70%, respectively, in 2017 and 14.70 and 31.05%, respectively, in 2018, compared with FP. Increases in effective panicle number and spikelet number per panicle were the main reason for the increase in yield under the integrated crop management treatments. Compared with FP, the HYP and SHYP treatments significantly increased the population dry matter by 26.40 and 56.64%, respectively, before the heading stage. Relative to N0 and FP, HYP and SHYP significantly increased the dry matter export, export rate, and translocation rate in the leaves, stems, and sheaths and significantly increased the photosynthetic potential throughout the growth stage and the net assimilation rate after the tillering stage. These increases were critical for improving the quality of rice and achieving higher yields. Our study provides a theoretical basis for the development of high‐yield cultivation methods for rice in northeast China.

show abstract

“…Given the world's population growth rate, an additional 26 million tons per year in world grain production is required. Moreover, Recently, numerous studies involving the combination of different crop management strategies and tactics, such as varied planting densities, water management, and different nutrient compositions, have been conducted, particularly in low latitude regions such as southern China, Pakistan, Philippines, and so on [7][8][9][29][30][31][32]. However, relatively few researchers have focused on the interactive effects of planting density and nutrient management on rice yield in northern China.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Nitrogen Rate and Planting Density for Improving the Grain Yield of Different Rice Genotypes in Northeast China

et al. 2019

View full text Add to dashboard Cite

Nitrogen fertilization and planting density are two key factors that can interactively affect the grain yield of rice. Three different types of rice cultivars-inbred Shendao 47, inbred Shendao 505, and hybrid Jingyou 586-were applied to investigate the effects of the nitrogen (N) rate and planting density (D) on the aboveground biomass, harvest index, leaf photosynthetic features, grain yield, and yield components using a split-split-plot design at two sites over two continuous years. The main plots were assigned to four nitrogen fertilizer rates: 0 (N0), 140 (N1), 180 (N2), and 220 (N3) kg ha −1 N; the subplots were assigned to three planting densities: 25 × 10 4 (D1), 16.7 × 10 4 (D2), and 12.5 × 10 4 (D3) hills ha -1 , and the sub-subplots were assigned to three rice cultivars. The results showed that the grain yield had a significantly positive correlation with the stomatal conductance (Gs), net photosynthesis rate (Pn), transpiration rate (Tr), chlorophyll content (SPAD value), leaf area index (LAI), panicles per unit area, and spikelets per panicle. The N rate and planting density had significant interaction effects on grain yield, and the maximum values of Shendao 47, Shendao 505, and Jingyou 586 appeared in N3D2, N2D1, and N3D3, respectively. The higher grain yield of midsized panicle Shendao 47 was mostly ascribed to both panicles per unit area and spikelets per panicle. More panicles per unit area and spikelets per panicle primarily contributed to a larger sink capacity of small-sized panicle rice Shendao 505 and large-sized panicle rice Jingyou 586. We found that the treatments N3D2, N2D1, and N3D3 could optimize the contradiction between yield formation factors for Shendao 47, Shendao 505, and Jingyou 586, respectively. Across years and sites, the regression analysis indicated that the combinations of nitrogen fertilization of 195.6 kg ha −1 with a planting density of 22 × 10 4 hills ha −1 , 182.5 kg ha −1 with 25 × 10 4 hills ha −1 , and 220 kg ha −1 with 13.1 × 10 4 hills ha −1 are recommended for medium-, small-, and large-sized panicle rice cultivars, respectively. food habits are changing due to rising living standards, such as the increased consumption of livestock products (such as meat, eggs, and milk), which drives the increase in demand for feed grains, especially in Asia [4,5]. At present, China's area under rice cultivation is 30.3 million hectares with the total yield reaching 207.7 million tons and an average yield of 6.8 t ha −1 , which is 65% higher than that of the world average [6]. China, the world's largest rice producer, has sustainably fed 22% of the world's population using only 7% of the arable land in the world. However, in the past 10 years, increases in rice yield have been slowing down in China, and the increasing population and shortage of arable land have exerted tremendous stress on food security [7]. Therefore, to ensure food security for the growing population, improving rice productivity (production per unit area) remains a priority in China.Much emphasis has been put...

show abstract

Improving rice population productivity by reducing nitrogen rate and increasing plant density

Cited by 76 publications

References 39 publications

Applying nitrogen fertilizer increased anthocyanin in vegetative shoots but not in grain of purple rice genotypes

Applying nitrogen fertilizer increased anthocyanin in vegetative shoots but not in grain of purple rice genotypes

Improving photosynthetic production in rice using integrated crop management in northeast China

Optimization of Nitrogen Rate and Planting Density for Improving the Grain Yield of Different Rice Genotypes in Northeast China

Contact Info

Product

Resources

About