scholarly journals The use of humic acid urea fertilizer for increasing yield and utilization of nitrogen in sweet potato  

2017 ◽  
Author(s):  
Chen Xiaoguang ◽  
Kou Meng ◽  
Tang Zhonghou ◽  
Zhang Aijun ◽  
Li Hongmin
Keyword(s):  
Humic Acid ◽  
Sweet Potato ◽  
Production Efficiency ◽  
Potato Production ◽  
Utilization Rate ◽  
Nitrogen Accumulation ◽  
Storage Root ◽  
Nitrogen Absorption ◽  
Storage Roots ◽  
Urea Fertilizer

Humic acid urea fertilizer (HA-N) is a new type of slow-release nitrogenous fertilizer that can enhance utilization rate of urea, and consequently increases crop yield. However, there were few researches about the effect of HA-N on the nitrogen absorption and utilization in sweet potato production. Hence, the effect of HA-N on nitrogen accumulation and distribution, nitrogen use efficiency (NUE), and yield of sweet potato was studied in the field using the <sup>15</sup>N tracer technique. Results showed that HA-N significantly increased the number of storage roots per plant and the average fresh weight per storage root, as well as the yield increased by 29.6% compared with urea fertilizer. Furthermore, nitrogen accumulation of total plant was higher under the HA-N. In addition, HA-N significantly increased nitrogen production efficiency of fertilizer and nitrogen production efficiency. Results of a <sup>15</sup>N tracer experiment revealed that the percentage of nitrogen absorbed by plant from fertilizer increased from 31.1% to 38.7% and NUE increased from 33.5% to 44.8% with application of HA-N when compared with single N treatment, respectively. HA-N significantly increased sweet potato storage root yield, nitrogen absorption and NUE, as well as it reduced the loss of nitrogen fertilizer.  

scholarly journals The use of humic acid urea fertilizer for increasing yield and utilization of nitrogen in sweet potato

2017 ◽  
Vol 63 (No. 5) ◽  
pp. 201-206 ◽  
Author(s):  
Chen Xiaoguang ◽  
Kou Meng ◽  
Tang Zhonghou ◽  
Zhang Aijun ◽  
Li Hongmin
Keyword(s):  
Humic Acid ◽  
Sweet Potato ◽  
Production Efficiency ◽  
Potato Production ◽  
Utilization Rate ◽  
Nitrogen Accumulation ◽  
Storage Root ◽  
Nitrogen Absorption ◽  
Storage Roots ◽  
Urea Fertilizer

Humic acid urea fertilizer (HA-N) is a new type of slow-release nitrogenous fertilizer that can enhance utilization rate of urea, and consequently increases crop yield. However, there were few researches about the effect of HA-N on the nitrogen absorption and utilization in sweet potato production. Hence, the effect of HA-N on nitrogen accumulation and distribution, nitrogen use efficiency (NUE), and yield of sweet potato was studied in the field using the <sup>15</sup>N tracer technique. Results showed that HA-N significantly increased the number of storage roots per plant and the average fresh weight per storage root, as well as the yield increased by 29.6% compared with urea fertilizer. Furthermore, nitrogen accumulation of total plant was higher under the HA-N. In addition, HA-N significantly increased nitrogen production efficiency of fertilizer and nitrogen production efficiency. Results of a <sup>15</sup>N tracer experiment revealed that the percentage of nitrogen absorbed by plant from fertilizer increased from 31.1% to 38.7% and NUE increased from 33.5% to 44.8% with application of HA-N when compared with single N treatment, respectively. HA-N significantly increased sweet potato storage root yield, nitrogen absorption and NUE, as well as it reduced the loss of nitrogen fertilizer.

scholarly journals Effect of cutting position and vine pruning level on yield of Sweet Potato (Ipomoea Batatas L.)

1970 ◽  
pp. 01-05
Author(s):  
Ncube Netsai ◽  
Mutetwa Moses, Mtaita Tuarira
Keyword(s):  
Sweet Potato ◽  
Root Length ◽  
Ipomoea Batatas ◽  
Block Design ◽  
Root Diameter ◽  
Root Weight ◽  
Stem Cuttings ◽  
Storage Root ◽  
Storage Roots ◽  
Significant Difference

There is significant variation in yield of storage roots and vines of sweet potato (Ipomoea batatas) among farmers due to use of different cutting positions and pruning of vines at different levels. This study was carried out to establish the cutting position and the vine pruning level that give the best yield of both the storage roots and vines. The study was conducted in a 3x3 factorial arrangement in Randomized Complete Block Design (RCBD) with three replications. Treatments included cutting position at three levels (apical cutting, middle cutting and basal cutting) and pruning at three levels, 0%, 25% and 50% respectively. Pruning was done. 50 days after planting. And storage root harvesting was done 100 days after planting. The two measurements were summed up to give the total vine weight. Storage root length, diameter and weight were measured at 100 DAP. Storage root length indicated significant difference (P<0.05) only among cutting positions with highest mean length (16.20 cm) obtained from apical cutting and the lowest (11.98 cm) from basal cutting. Storage root diameter, storage root weight and vine weight indicated significant interaction (P<0.05) of cutting position and vine pruning level. Highest mean root diameter and root weight were obtained from middle cutting and 25% vine pruning level, with the lowest being obtained from basal cutting and 50% vine pruning level. Highest vine weight was recorded from middle cutting and 50% vine pruning level, with the lowest being recorded from basal cutting and 0% vine pruning level. Both middle and apical stem cuttings can be recommended for higher storage root and vine yield. Vine pruning at 25% can be adopted for higher storage root yield while pruning at 50% can be suggested for higher vine yield.

Effects of Previous Insect Feeding Injury to Sweet Potato on Resistance to Sweet Potato Weevil (Coleoptera: Curculionidae) and Storage Root Chemistry

2003 ◽  
Vol 38 (1) ◽  
pp. 72-83
Author(s):  
Lixin Mao ◽  
Richard N. Story ◽  
Abner M. Hammond ◽  
Joseph K. Peterson ◽  
Don R. Labonte
Keyword(s):  
Caffeic Acid ◽  
Sweet Potato ◽  
Larval Survival ◽  
Pupal Weight ◽  
Storage Root ◽  
Storage Roots ◽  
Resin Glycoside ◽  
Adult Feeding ◽  
Sweet Potato Weevil ◽  
Potato Resistance

The effects of root and foliage feeding on sweet potato resistance to sweet potato weevil, Cylas formicarius (F.), and on the levels of resin glycoside and caffeic acid in sweet potato storage root periderm tissues were studied. Genotypes (“Beauregard,” “Excel,” “W-244,” “W250,” and “Sumor”) with varying levels of sweet potato weevil resistance were evaluated. Adult banded cucumber beetle, Diabrotica balteata LeConte, and larval Spodoptera latifascia (Walker) were introduced onto caged sweet potato plants in the field to elicit root feeding and defoliation on plants. Storage roots were evaluated for sweet potato weevil resistance by quantifying sweet potato weevil adult feeding, oviposition, larval survival, and pupal weight. Both root and foliage injuries were associated with an increase in oviposition (significant in 1998 but not in 1997), but there was no association with adult feeding, larval survival and pupal weight. Genotype had a significant effect on adult feeding, oviposition, and larval survival but not on pupal weight. Root and foliage injuries did not have a significant effect on the levels of resin glycoside and caffeic acid in storage roots. The levels of these compounds differed significantly among genotypes, but there was no apparent relationship between sweet potato weevil resistance (antibiosis) and the levels of these compounds.

scholarly journals Relationship of Photosynthesis and Harvest Index to Sweet Potato Yield

1990 ◽  
Vol 115 (2) ◽  
pp. 288-293 ◽  
Author(s):  
Ajmer S. Bhagsari ◽  
Doyle A. Ashley
Keyword(s):  
Sweet Potato ◽  
Harvest Index ◽  
Ipomoea Batatas ◽  
Field Experiments ◽  
Storage Root ◽  
Canopy Photosynthesis ◽  
Storage Roots ◽  
Physiological Basis ◽  
Area Index ◽  
Stage Of Development

Field experiments with 15 sweet potato [Ipomoea batatas L. (Lam.)] genotypes were conducted to study the physiological basis of yield in 1981 and 1982. The leaf area index differed significantly among the sweet potato genotypes during early and late phases of growth, hut showed an inconsistent relationship with yield. Single leaf net photosynthesis ranged from 0.74 to 1.12 mg CO2/m' per sec. Canopy photosynthesis for sweet potato genotypes differed significantly in 1981, but not in 1982. It ranged from 0.81 to 1.16 mg CO2/m2 per sec in Aug. 1981. and from 0.63 to 0.88 mg CO2/m2 per sec in 1982. Four hours after “C-labeling, 14C-assimilate translocation from the treated leaf ranged from 21% to 46%, but did not differ significantly among the genotypes. At final harvest, harvest index [HI, defined as (storage root yield/total biological yield) × 100] of the genotypes varied from 43% to 77% and 31% to 75% for 1981 and 1982, respectively. Canopy photosynthesis during September was significantly correlated with storage root dry matter yield (r = 0.54*) in 1981 and with phytomass (above-ground biomass plus storage roots) (r = 0.60*) in 1982. Both phytomass and HI were significantly correlated with storage root matter yield. Canopy photosynthetic evaluation of sweet potato germplasm may be-more relevant when the storage root sinks are at an advanced stage of development. Our study suggests that yield is poorly predicted by Pn, particularly when the genotypes have different leaf sizes.

scholarly journals Effect of planting methods on growth and yield of sweet potato (Ipomoea batatas L.) varieties at Luyengo, midlevel of Eswatini

2021 ◽  
Vol 11 (1) ◽  
pp. 013-021
Author(s):  
Sakhile Sipho Dlamini ◽  
Mzwandile Petros Mabuza ◽  
Bonginkhosi Edward Dlamini
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Growth And Yield ◽  
Storage Root ◽  
Root Yield ◽  
Storage Roots ◽  
Potato Varieties ◽  
Planting Methods ◽  
Method Of Planting ◽  
Planting Method

Sweet potato (Ipomoea batatas L.) is the most grown storage root crop in Eswatini. However, its storage root yield is low among smallholder farmers partly due to use of inappropriate varieties and agronomic practices such as planting method. Thus, a field experiment was conducted at the University of Eswatini, Faculty of Agriculture, Luyengo, during 2019/2020 cropping season to determine the effects of planting method on growth and yield of the three sweet potato varieties. Two planting methods, namely horizontal and vertical; and three sweet potato varieties, namely Kenya-white, Ligwalagwala and Lamngititi were evaluated in a factorial arrangement in randomized complete block design in three replications. Results showed non-significant difference between the planting methods in most growth and yield parameters recorded for the sweet potato varieties. However, the vertical method of planting had relatively higher vine length, number of branches, mass of storage roots and storage root yield than the horizontal method. On the other hand, there were significant (P<0.05) differences among the sweet potato varieties for most of parameters recorded. The sweet potato variety Ligwalagwala had the highest vine length, number of storage roots per plant (6.47), mass of storage roots per plant (1137 g) and storage root yield (12.01 tonnes/ha). Thus, either horizontal or vertical method of planting and variety Ligwalagwala can be used to increase the productivity of sweet potato in the study area.

scholarly journals Sweet potato production efficiency in Nigeria: Application of data envelopment analysis

2019 ◽  
Vol 4 (3) ◽  
pp. 672-684
Author(s):  
Abigail Gbemisola Adeyonu ◽  
◽  
Olubunmi Lawrence Balogun ◽  
Babatunde Oluseyi Ajiboye ◽  
Isaac Busayo Oluwatayo ◽  
...  
Keyword(s):  
Data Envelopment Analysis ◽  
Sweet Potato ◽  
Production Efficiency ◽  
Potato Production ◽  
Data Envelopment

scholarly journals NITROGEN FERTILIZATION OF SWEET POTATO AND ITS EFFECT ON HOOT SET AND YIELD

HortScience ◽  
1994 ◽  
Vol 29 (7) ◽  
pp. 726d-726
Author(s):  
W.A. Mulkey ◽  
W.B. McLemore ◽  
T.P. Talbot
Keyword(s):  
Sweet Potato ◽  
Nitrogen Fertilization ◽  
Storage Root ◽  
Storage Roots ◽  
N Level ◽  
Vine Growth ◽  
N Treatment ◽  
N Rates

In preplant nitrogen studies with the `Beauregard' Variety maximum yields of U.S. No. 1 grade roots are produced using 50.4 kg/ha N. In 1992 studies were initiated to determine the effect of preplant N rates on storage root set and yield. Preplant N rates ranged from 0 to 84 kg/ha in 16.8 kg/ha increments. Two plots each of 0, 16.8 and 33.6 kg/ha were included so sidedress applications could be made to bring one of the treatments to the 50.4 kg/ha N level 30 days after transplanting. The 0 kg/ha N treatment had significantly more storage roots per plant than all other treatments 21 days after transplanting and more vine growth measured by weight. The 0 and 16.8 kg/ha treatments had significantly more storage roots 26 days after transplanting. At 26 and 35 days after transplanting vine growth was greater in 16.8 kg/ha N treatment. The 0 plus 50.4 kg/ha N sidedress treatment produced the highest yield of U.S. No. 1 grade roots with the highest number of marketable roots per plant (5.0). Similar results were obtained in the 1993 studies.

scholarly journals EFFECT OF CHANNEL DEPTH ON YIELD OF SWEET POTATOES GROWN HYDROPONICALLY

HortScience ◽  
1990 ◽  
Vol 25 (8) ◽  
pp. 856b-856
Author(s):  
C. Morris ◽  
D. Mortley ◽  
P. Loretan ◽  
C. Bonsi ◽  
W. Hill
Keyword(s):  
Sweet Potato ◽  
Life Support ◽  
Storage Root ◽  
Life Support System ◽  
Storage Roots ◽  
Channel Depth ◽  
Sweet Potatoes ◽  
Manned Space ◽  
Manned Space Missions

The potential of the sweet potato as a food source for future long-term manned space missions is being evaluated for the National Aeronautics and Space Administration's (NASA) Controlled Ecological Life Support System (CELSS) Program. Several experiments have shown that the sweet potato can be grown hydroponically. However, an evaluation of the NASA fan-shaped Biomass Production Chamber (BPC) channel was initiated to determine if channel depths influenced the yield of hydroponically grownsweet potatoes. Three channel depths were studied, 5 cm (2 in) standard NASA BPC channel, 10 cm (4 in) channel and 15 cm (6 in) channel. The experiment consisted of one replication. The results show that channel depth does effect the yield of storage roots. The 15 cm depth channel provided the most consistent yield with all channels having significantly different fresh storage root yields in the replicate.

scholarly journals Metabonomic Profiling Analyses Reveal ANS Upregulation to Enhance the Flavonoid Pathway of Purple-Fleshed Sweet Potato Storage Root in Response to Deep Shading

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 737
Author(s):  
Ying He ◽  
Dan Zhu ◽  
Yujun Sun ◽  
Qian Wang ◽  
Lan Zhu ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Soluble Sugars ◽  
Economic Benefits ◽  
Mass Spectrometry Analysis ◽  
Anthocyanin Synthesis ◽  
Anthocyanin Content ◽  
Potato Storage ◽  
Storage Root ◽  
Flavonoid Pathway ◽  
Storage Roots

Intercropping, as a common worldwide cultivation pattern, provides opportunities for sustainable agriculture with fuller use of light, temperature and land resources and greater yield per unit of land. The intercropping impact on crop quality is a current focus. This study found that shading cultivation of purple-fleshed sweet potato can improve the storage root pigment accumulation by more than 20% to increase economic benefits. We performed gas chromatography and mass spectrometry analysis of storage roots of the anthocyanin-enriched cultivar Jihei-1 under 60% shading and nonshaded treatments. A total of 224 differential metabolites were identified, among which N-acetyl-5-hydroxytryptamine, 1-monopalmitin, 4-pyridoxic acid, dodecano, arbutin, tryptophan, citrulline and phenylalanine were significantly upregulated under shading with a more than 10-fold change. Furthermore, metabolic pathway enrichment maps were based on the biological processes and stratification level selected. These metabolites mainly influenced the pathways of phenylpropanoid biosynthesis, the citrate cycle, organic acid biosynthesis and metabolism and amino acid metabolism. Through tissue-specific dynamic changes in amino acids, soluble sugars, starch and anthocyanins during storage root development, we proposed a variety-specific strategy of purple-fleshed sweet potato in response to prolonged deep shading, that is, utilizing and enhancing broad aboveground-tissue photosynthesis and transferring photosynthates into roots in advance, leading to a rapid increase in storage root anthocyanin synthesis. With comprehensive qPCR, western blot and enzyme activity analyses, we identified three key enzymes, CHS, ANS and 3GT, in purple-fleshed sweet potato storage roots in response to shading, which affect the root anthocyanin content by influencing the flavonoid metabolism pathway. This study provides a theoretical basis for revealing the regulation of anthocyanin synthesis in crops and a guidance for high-quality sweet potato cultivation and nutritional improvement using shade facilities.

scholarly journals The assessment of yield and quality traits of sweet potato (Ipomoea batatas L.) genotypes in middle Black Sea region, Turkey

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257703
Author(s):  
Yasin Bedrettin Karan ◽  
Özlem Gültekin Şanli
Keyword(s):  
Sweet Potato ◽  
Black Sea ◽  
Ipomoea Batatas ◽  
Dry Matter ◽  
Quality Traits ◽  
Storage Root ◽  
Root Yield ◽  
Storage Roots ◽  
Yield And Quality ◽  
Second Year

Sweet potato (Ipomoea batatas L.) cultivation in Turkey is concentrated in one province situated in Mediterranean region only, which would not fulfill the domestic needs of the country soon. Therefore, cultivation of the crop in other provinces/climatic regions should be initiated to fulfill the domestic needs. The cultivation in other provinces requires thorough assessment of yield and quality traits of target crop. Therefore, yield and quality characteristics of four sweet potato genotypes (i.e., ‘Hatay Kırmızısı’, ‘Hatay Yerlisi’, ‘Havuc’ and ‘Kalem’) were assessed in the current study in Kazova and Niksar counties of Tokat province of the country having middle Black Sea climate in field experiments during 2018 and 2019. The cuttings of the genotypes were planted in Niksar during the second fortnight of April and first week of May in Kazova. The planting density was kept 90 × 45 cm. Data relating to number of storage roots, storage root weight, storage root yield per hill and storage root yield per hectare were recorded. Furthermore, quality traits, including dry matter ratio (%), protein ratio (%) and antioxidant ratio (%) of storage roots were also determined. The highest total storage root yield was recorded for ‘Havuc’ genotype during both years and locations, followed by ‘Hatay Yerlisi’ and ‘Hatay Kırmızısı’ genotypes. Overall, storage root yield (60.06 and 62.40 tons ha-1 during first and second year) recorded for the experiment at Niksar was higher than the storage root yield recorded for Kazova experiment (53.50 and 52.84 tons ha-1 during first and second year, respectively). The highest dry matter was produced by ‘Kalem’ and ‘Hatay Yerlisi’ genotypes during both years and at both locations, followed by ‘Hatay Kırmızısı’ and ‘Havuc’ genotypes. The storage roots of the tested genotypes accumulated higher dry matter at Kazova during both years. The highest protein content was obtained from the ‘Kalem’ genotype, and the protein contents of the ‘Hatay Yerlisi’ and ‘Hatay Kırmızısı’ genotypes were close to the ‘Kalem’ genotype. The results indicated that tested genotypes can successfully be cultivated in middle Black Sea climate. Therefore, production of sweet potato can be initiated in the future to meet the domestic needs for sweet potato in the country.

Sign in / Sign up

Export Citation Format

Share Document