The growth character of sago palm based on differences in time of trunk formation D R Sari, M F Sanjaya, I Arham, K Osozawa Iop Conference Series Earth and Environmental Science, 2023 This study aimed to (1) characterized sago palms with different trunk formation times; (2) studied the growth characteristics related to the diameter of the sago trunk. This research was conducted at the Sago Cultivation Experimental Site located in Pengkajoang Village, West Malangke District, North LuwuRegency.Thegrowth characters studied were number of leaves, trunk diameter, leaf length,petiole length, tree height,rachis length, number of suckers, length of the most extended leaflets, number of leaflets and the width of broadest leaflets. A paired T-Test was used to analyze the average of three variables between sago-forming trunks at 3 years, 3.5 years, and 4 years after transplanting. In addition to correlation analysis, variables were compared based on their relationships.The sago palm that formed the trunk at 3 years after transplanting had the highest number of leaves (20 strands), 3.5 years (17 strands), and 4 years (16 strands). Conversely, sago palms that form trunks 4 years after transplanting have the widest leaflets(7.44 cm), 3.5 years (6.04 cm) and 3 years (6.52 cm). Based on correlation analysis and path analysis, it is known that the number of leaves, tree height and rachis length are characteristics of sago palm growth which have a significant effect on the formation of trunk diameter.
Seaweed extract effect on arbuscular mycorrhizae spore in soil engineered by earthworm, and the soil effect on upland rice growth L M H Kilowasid, R Ariansyah, L Afa, G A K Sutariati, Namriah, T C Rakian, M F Sanjaya, W S A Hisein Iop Conference Series Earth and Environmental Science, 2022 Seaweed extract is known to contain nutrients and growth-regulating substances that affect soil biota, and a source of protection against pests and diseases. Earthworm, which is an example of a soil biota and playing the role of ecosystem engineer, has the ability to produce suitable land biostructures, for the inhabitation of arbuscular mycorrhizal fungi (AMF), which has an impact on upland rice growth. Therefore, this study aims to determine, (i) the effect of seaweed extract on the population of earthworms and spores of arbuscular mycorrhizal fungi, and (ii) the impact of the engineered soil on the growth of local upland rice varieties. Furthermore, the extract of seaweed, such as Kappapychus alvarezii, was divided into five concentration levels, namely 0%, 20%, 40%, 60%, and 80%. Each treatment was drenched into the soil from the cogongrass vegetated area, mixed with 20 Pheretima sp., and maintained for 49 days in the greenhouse. The result showed that the total difference in the earthworms’ concentration treatments was not significant. It also showed that the total AMF spores in the engineered soil products of 20% concentration was the highest. Based on treatment with the earthworm engineered soil products, the highest and lowest vegetative growth and yield components of upland rice were observed at the concentrations of 80% and 0%, respectively. In conclusion, the application of seaweed extract to the soil did not significantly reduce the earthworm population. The extract concentration of 20% also increased the total AMF spore in the engineered soil. Moreover, highly treated engineered soil products increased the growth and yield components of upland Kambowa rice on cogongrass soils.
The use of soil biostructures created by soil fauna ecosystem engineers fed with different organic materials as inoculum source of arbuscular mycorrhiza fungi on cocoa seedling Laode Muhammad Harjoni Kilowasid, Muhammad Fahyu Sanjaya, Laode Sabaruddin, Rachmawati Hasid, Darwis Sulaeman, Andi Nurmas Sains Tanah, 2021 <p><span lang="IN">Soil fauna as ecosystem engineers </span><span>have the ability to </span><span lang="IN">creat</span><span>e </span><span lang="IN">soil biostructure</span><span>s, with the capacity to </span><span lang="IN">sav</span><span>e</span><span lang="IN"> arbuscular mycorrhizal fungi (AMF) spores. </span><span>This study therefore aims to </span><span lang="IN">investigate the </span><span>AMF </span><span lang="IN">spore density in the biostructures created by cooperation between earthworms and ants with a different organic matter composition</span><span>,</span><span lang="IN"> and to analyze the </span><span>biostructures’ </span><span lang="IN">potential as a source of </span><span>AMF </span><span lang="IN">inoculum on cocoa seedlings. </span><span>In the first experiment, a </span><span lang="IN">combination of earthworms and ants composition</span><span>, as well as a </span><span lang="IN">mixture of <em>G. sepium</em> leaf (GLP), cocoa shell bean (CSB), and sago dregs (SD)</span><span>,</span><span lang="IN"> was tested</span><span>. Meanwhile, </span><span lang="IN">in the </span><span>second</span><span lang="IN"> experiment</span><span>, t</span><span lang="IN">he</span><span> effect of</span><span lang="IN"> biostructures on cocoa seedlings grown </span><span>i</span><span lang="IN">n unsterile soil</span><span>,was </span><span lang="IN">examined</span><span>. According to the results, the highest</span><span lang="IN"> AMF spore </span><span>density was obtained using </span><span lang="IN">20 earthworms+10 ants with 50%GLP+50%CSB + 0%SD treatment</span><span>. Furthermore, the t</span><span lang="IN">otal AMF spores </span><span>were </span><span lang="IN">positively correlated</span><span> with the total P value, but negatively correlated </span><span lang="IN">with </span><span>the </span><span lang="IN">C/N ratio</span><span>. Therefore, bi</span><span lang="IN">ostructure application increased AMF spores number in rhizosphere and </span><span>the cocoa seedling’s </span><span lang="IN">root infection</span><span>. Furthermore, </span><span lang="IN">biostructure</span><span>s</span><span lang="IN"> resulting from the collaborative activity </span><span>between</span><span lang="IN"> different soil fauna ecosystem engineers </span><span>were able to transmit </span><span lang="IN">AMF spore</span><span>s </span><span lang="IN">to </span><span>infected </span><span lang="IN">plant root</span><span>s</span><span lang="IN"> growing </span><span>i</span><span lang="IN">n non-sterile soil.</span></p>
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The growth character of sago palm based on differences in time of trunk formation DR Sari, MF Sanjaya, I Arham, K Osozawa IOP Conference Series: Earth and Environmental Science 1230 (1), 012214 , 2023 2023
