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Response of maize growth and soil biological characteristics to planting density under fertigation in a semi-arid region

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International Journal of Agricultural and Biological Engineering 2024年第2期17卷 186-192页

作者： Peng Jiang Lei Li Dejia Xu Rui Wang Quan Sun School of Forestry and Prataculture Ningxia UniversityYinchuan 750021China Institute of Agricultural Resources and Environment Ningxia Academy of Agriculture and Forestry SciencesYinchuan 750002China School of Agriculture Ningxia UniversityYinchuan 750021China

Increasing the planting density can exacerbate crop competition for water,nutrients and space which results in a decline in the crop ***,the effect of increasing planting density on crop growth and soil biological characteristics in barren sandy land in the semi-arid regions are still *** this study,we investigated the effects of six planting densities(5.4×10^(4),6.45×10^(4),7.95×10^(4),9.5×10^(4),9.75×10^(4) and 10.5×10^(4) plants/hm^(2))on maize growth,photosynthesis characteristics,yield and soil biological characteristics in barren sandy soil in the semi-arid region of Ningxia,*** results indicated that the stem diameter and spike length decreased linearly with increasing planting *** plant height,spike weight,grain weight and 100-grain weight decreased with increasing plating ***,the root length increased with increasing planting *** diameter,volume and activity increased and then decreased with increasing planting *** was no significant difference(p>0.05)in the effect of planting density on transpiration rate intercellular CO_(2) *** well,the soil microbial biomass carbon and microbial biomass nitrogen decreased with increasing planting *** soil catalase activities increased and then decreased with increasing planting *** alkaline phosphatase activity,the amounts of soil bacteria and actinomycetes increased with increasing planting ***,a moderately increasing planting density can improve maize yield when water and nutrients are *** optimal planting density was 8.29×10^(4) plants/hm^(2) and the highest yield was 15.84 t/hm^(2) in barren sandy soil in semi-arid region of Ningxia,*** study provides a theoretical basis for high yield and high efficiency of maize.

关键词： maize growth planting density yield fertigation soil enzyme activity

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planting density affected biomass and grain yield of maize for seed production in an arid region of Northwest China

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Journal of Arid Land 2018年第2期10卷 292-303页

作者： JIANG Xuelian TONG Ling KANG Shaozhong LI Fusheng LI Donghao QIN Yonghui SHI Rongchao LI Jianbing Center for Agricultural Water Research in China China Agricultural University Key Laboratory of Biochemistry and Molecular Biology in Universities of Shandong Weifang University College of Agriculture Guangxi University Environmental Science and Engineering Program University of Northern British Columbia

Field experiments were conducted from 2012 to 2015 in an arid region of Northwest China to investigate the effects of planting density on plant growth, yield, and water use efficiency（WUE） of maize for seed production. Five planting densities of 6.75, 8.25, 9.75, 11.25 and 12.75 plants/m^2 were conducted in 2012, and a planting density of 14.25 plants/m^2 was added from 2013 to 2015. Through comparison with the Aqua Crop yield model, a modified model was developed to estimate the biomass accumulation and yield under different planting densities using adjustment coefficient for normalized biomass water productivity and harvest index. It was found that the modified yield model had a better performance and could generate results with higher determination coefficient and lower error. The results indicated that higher planting density increased the leaf area index and biomass accumulation, but decreased the biomass accumulation per plant. The total yield increased rapidly as planting density increased to 11.25 plants/m^2, but only a slight increase was observed when the density was greater than 11.25 plants/m^2. The WUE also reached the maximum when planting density was 11.25 plants/m^2, which was the recommended planting density of maize for seed production in Northwest China.

关键词： planting density yield model biomass accumulation grain yield water use efficiency Northwest China

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Root characteristics and yield of rice as affected by the cultivation pattern of strong seedlings with increased planting density and reduced nitrogen application

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Journal of Integrative Agriculture 2022年第5期21卷 1278-1289页

作者： GUAN Xian-jiao CHEN Jin CHEN Xian-mao XIE Jiang DENG Guo-qiang HU Li-zhen LI Yao QIAN Yin-fei QIU Cai-fei PENG Chun-rui Jiangxi Academy of Agricultural Sciences/Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River Ministry of Agriculture and Rural Affairs/National Engineering and Technology Research Center for Red Soil ImprovementNanchang 330200P.R.China

To address the relationships between the amount of nitrogen fertilizer application and the yield of double cropping rice systems,we investigated the effects of a cultivation pattern of strong seedlings with increased planting density and reduced nitrogen application(SDN)on the morphological and physiological characteristics of double cropping *** results indicated that the effects of SDN on the morphological characteristics of the single plant roots of double cropping rice were not significant,but the morphological characteristics of the population roots were largely ***,SDN significantly increased the morphological indexes of the root population such as root fresh weight,root volume,root number,root length and root dry *** effects of SDN on the total root absorption areas and root active absorption areas of the single plants were non-significant,but it dramatically enhanced the total root absorption areas and root active absorption areas of the plant population during the tillering,heading and mature *** addition,SDN significantly increased the root bleeding intensity and elevated the soluble sugar and free amino acid contents of root bleeding *** to the traditional cultivation pattern(CK),SDN significantly increased root bleeding intensity at the heading stage by 4.37 and 8.90% for early and late rice,***,SDN profoundly enhanced the soluble sugar contents of root bleeding sap by 12.85 and 10.41% for early and late rice,*** addition,SDN also significantly enhanced free amino acid content of root bleeding sap by 43.25% for early rice and by 37.50% for late rice systems compared to ***,SDN increased the actual yield of double cropping rice mainly due to the higher effective panicle number and the larger seedsetting *** actual yields of early rice under SDN were higher than CK by 9.37 and 5.98% in 2016 and 2017,and the actual yields of late rice under SDN were higher than CK b

关键词： planting density nitrogen fertilizer double cropping rice root yield

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Effects of planting density and Row Spacing on Plant Productivity of Autumn Forage Sweet Sorghum in Hebei Province

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Agricultural Biotechnology 2018年第1期7卷 44-49,54页

作者： Hanzhang ZHOU Huan LIU Haiyan JIA Zhimin WEI Shuhong YUAN Shenglin HOU Shunguo LI Institute of Millet Crops Hebei Academy of Agriculture and Forestry Sciences National Foxtail Millet Improvement Center Minor Cereal Crops Laboratory of Hebei Province Shijiazhuang 050035 China Shenze County Agriculture Bureau Shenze 052560 China

[ Objective] This study was conducted to investigate the relationship between each of planting density and row spacing and plant productivity of forage sweet sorghum planted in autumn idle land. [ Methods] Using split-plot experiment design experiment method and LSD method of IBM. SPSS. Statistics. v22 statistics software, the effects of planting density and row spacing on plant productivity of forage sweet sorghum planted in autumn idle land were compared. [ Result] The results showed that the planting density and row spacing had important influences on plant productivity of forage sweet sorghum planted in autumn idle land. Moreover, the optimal combination of plant productivity for A1B4 , i. e. ,under the combination of the planting density of 7.5 × 10^4 plants/hm^2 and the row spacing of 40 cm, the fresh weight and dry weight per plant were 654.37 and 147.11 g/plant, respectively. [ Conclusion ] The results provided a theoretical basis for the production of forage sweet sorghum in autumn idle land.

关键词： Autumnidle land Forage sweet sorghum planting density Row spacing Plant productivity

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Effects of planting density and Cutting Time on Hay Yield and Nutritional Value of Forage Soybean HN389

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Journal of Northeast Agricultural University(English Edition) 2022年第2期29卷 18-27页

作者： Liu Wei Guo Yue Lu Ya-lin Wang Bo HuaYi Zhu Si-qi Qin Li-gang Hu Guo-fu College of Animal Sciences and Technology Northeast Agricultural UniversityHarbin 150030China

Forage soybean is an important source of high protein *** screening and breeding not only can solve the adjustment of agricultural planting structure,but also can provide a large amount of high-protein forage material,and effectively solve the problem of a serious shortage of high-protein forage in herbivorous animal husbandry in *** this study,the feeding-type soybean strain HN389 was selected as experimental material,with three planting densities of 270000,405000 and 540000 plants•hm^(-2) and three cutting periods of the initial pod stage(R1),the initial grain stage(R2)and the early mature stage(R3)were set to determine the yield and feeding quality,in order to obtain the best planting density and harvest time of the *** results showed that in forage soybean strain HN389 at the R1 and R2 stages,plant height increased with increasing planting densities,while fresh and dry weight per plant decreased with increasing planting densities,and there was no significant difference at the R3 *** yield of hay at the R1,R2 and R3 stages increased firstly and then decreased with the increase of planting densities,and the yield per hectare was R3>R2>*** order of contents of crude protein(CP),neutral detergent fibers(NDF)and acid detergent fiber(ADF)in feeding quality of HN389 were R2>R1>R3,and ether extract(EE)content order was R3>R1>R2,and there was no significant difference among different *** principal components were extracted from five forage indexes including CP,NDF,ADF,EE and fresh grass yield by principal component *** cumulative contribution rate of principal components 1 and 2 was 90.053%,and their characteristic values were 3.617 and 0.885,*** a comprehensive evaluation,harvested at the R3 stage and the density was 405000 plants•hm^(-2),HN389 had the highest comprehensive score of 0.344,yield of 38035.53 kg•hm^(-2),CP,NDF,ADF and EE contents of 17.61%,17.61%,21.54%and 3.81%,respectively.

关键词： soybean nutritional composition yield planting density cutting time

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Effects of planting density on Growth of New Clones in Populus tomentosa

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Forestry Studies in China 2003年第2期5卷 23-29页

作者： Zhang Zihui Zhang Zhiyi Lin Shanzhi Li Xinguo College of Biological Sciences and Biotechnology Beijing Forestry University Beijing 100083 P. R. China

Effects of seven planting densities on the growth and tree form of nine 5-year-old new clones in Populus tomentosa were studied. The plantations, arranged with completely random block design, were located in Wuzhi County, Henan Province. Results indicated that effects of planting density on the diameter at breast height (DBH), individual volume and growing stock increment of all new clones in P. tomentosa were significant at the 1% level of probability, effects of planting density on the tree height increment of new clones B2 and B31 and on the live branches height (LBH) increment of new clones B5 and B30 were significant at the 5% level of probability, while the interaction between planting density and clone was not significant at the 5% level of probability. It was concluded that the degree of differences among new clones within the same planting density was different with different planting densities and traits. For short rotation industrial timber, clones B1, B3, B4, B5, B7, B9, B31 were suitable with the density of 1 0002 500 trees per hectare, while for bigger diameter timber, clones B1, B3, B4, B7, B9, B31 could be used with the planting density of 660833 trees per hectare. Clonal repeatability was also different in different planting densities.

关键词： Populus tomentosa Carr. new clones planting density growth

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Effects of planting density of Quinoa on Agronomic Characters and Yield in Chengde

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Meteorological and Environmental Research 2022年第5期13卷 103-105,109页

作者： Chuan LU Yueyou LI Qian CUI Yonggang XIANG Wei LV Zhimin WEI Hebei Science and Technology Innovation Service Center Shijiazhuang 050035China Shijiazhuang Botanical Garden Shijiazhuang 050011China Guyuan Beimai Ecological Agriculture Co. Ltd.Guyuan 076500China Institute of Millet Crops Hebei Academy of Agriculture and Forestry SciencesShijiazhuang 050035China

[Objectives]To study the optimum sowing density of quinoa in Chengde region.[Methods]Yanli No.2 cultivated by Institute of Millet Crops,Hebei Academy of Agriculture and Forestry Sciences was taken as test *** Chengde region,single-factor density test design was used to study the effects of sowing on agronomic characters and yield of quinoa.[Results]Quinoa had the highest comprehensive yield when row spacing was 30 cm and plant spacing was 25 cm.[Conclusions]The research could provide theoretical basis for quinoa planting in Chengde region.

关键词： Quinoa planting density Chengde Agronomic characters Yield

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Effect of Fertilizing Amount and planting density on Yield and Qual-ity of Strong-gluten Wheat Taishan 27

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Asian Agricultural Research 2017年第1期9卷 62-64,69页

作者： Yong MI Guangde LU Chao WANG Xianyin SUN Ruixia WANG Qiuhuan MU Tai'an Academy of Agricultural Sciences

To get the cultivation pattern featured by improved varieties and fine methods for strong-gluten and high-yielding wheat variety Taishan 27,this paper used Taishan 27 as material to study the effect of fertilizing amount and planting density on yield and quality of *** results showed that Taishan 27 had high yield under fertilizing amount of 225 kg/ha pure nitrogen and planting density of 240 × 104-300× 10~4/ha; the yield was lowest under fertilizing amount of 300 kg/ha pure nitrogen and planting density of 360 × 10~4/ha. The suitable planting density for Taishan 27 was 240 × 104-300 × 10~4/ha,and the fertilizing amount of nitrogen should be based on different soil fertility conditions to avoid water and fertilizer stress and improve yield.

关键词： Wheat Taishan 27 Fertilizing amount planting density

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Effect of planting density on Physiological Indexes, Agronomic Traits and Yield of Buckwheat ( Fagopyrum esculentum Moench.)

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Agricultural Biotechnology 2021年第3期10卷 22-25页

作者： Yaojun CHANG Yangxiu MU Juan GU Zhiyuan LU Yanping DU Keqin CHANG Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions CMABeijing 100081China Ningxia Key Lab of Meteorological Disaster Prevention and Reduction Guyuan 756000China Guyuan Branch Ningxia Academy of Agriculture and Forestry SciencesGuyuan 756000China

Ningqiao 1 was selected as the material to study the effects of planting density on physiological indices,agronomic traits and yield of *** results showed that high density resulted in decreases of chlorophyll content,soluble protein content and activity of SOD,POD and CAT,and acceleration of MDA accumulation under drought *** density could effectively improve the grain number per plant,grain weight per plant,1000-grain weight and yield in drought conditions.

关键词： Buckwheat(Fagopyrum esculentum Moench.) planting density Physiological index Agronomic trait Yield

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Effects of different planting density on yield and quality of naked oat

Effects of different planting density on yield and quality o...

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2019年中国作物学会学术年会

作者：王雪莱 Yu Song Yu Li-he Guo Wei Xue Ying-wen Agricultural College Heilongjiang Bayi Agricultural University Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement

【Research background】Oat(Avena sativa L.) is an annual herb of Avena in Gramineae, which has wide ecological adaptability and can be used to prepare hay or silage. It is one of the important forage crops in China’s agricultural and pastoral areas. The western region of Songnen Plain is an important cropping-pastoral interlacing regionin China, which is also a typical ecologically fragile area. Oats are widely cultivated in this area, However, the unreasonable planting density in actual production results in low utilization of light energy and low productivity. Therefore, this paper explores the influence of planting density on the growth, development, yield and quality of oat, in order to determine the appropriate planting density of oat in the western Songnen Plain.【Materials and methods 】The experiment was conducted in the experimental base of Heilongjiang Bayi Agricultural University(46°62 ’N, 125°20’ E). Single factor randomized group design was adopted in the experiment and 6 planting density levels of 3 million plants/hm(D1), 4.5 million plants/hm(D2), 6 million plants/hm(D3), 7.5 million plants/hm(D4), 9 million plants/hm(D5) and 10.5 million plants/hm(D6)plants/hm,the test material was Bai Yan 2. The area of the plot is 10.5 m2(7 m×1.5 m), 15 cm spacing, three times repeated. Plant height and stem diameter, hay yield, grain yield and yield components, grain crude protein, crude fat, starch and soluble sugar contents were measured respectively. SPSS software was used for data processing and related analysis.【Results and analysis】1. The plant height and stem diameter of oat showed a significant trend of decrease with the increase of density, and the plant height and stem diameter reached the optimal level of 105.07 cm and 2.59 mm respectively under D1 treatment. 2. With the increase of density, both grain yield and hay yield showed a trend of first rising and then falling, reaching a significant level under D2 treatment and D4 treatment respectively. 3. With t

关键词： Oats planting density Yield Quality

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