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Current Issue (Volume 01 - Issue 02)
Title: |
Investigations on growth and yield responses of date palms (Phoenix dactyliferaL.) to nitrogenous nutrition |
Authors: |
Fatima D.A. Salih, Elsadig H, Elsadig, Tagelsir I. M. Idris, Mohamed O. Jaffar |
Source: |
International Journal of Latest Research in Agriculture and Veterinary Sciences (IJLRAVS), pp 01 - 07, Vol 01 - No. 02, 2019 |
Abstract: |
The study was conducted at Al-Bakheet village, Karima Locality, Northern State, Sudan. The aim of this study was to investigate the growth attributes, yield and fruit physical traits of 'Barakawi' date palm cultivar to urea (46%N) applications. The selected trees were of uniform growth and size. Urea treatments were 0 (control), 50, 100, and 150 g/palm applied in the first season only. Their extended effects were also considered in the succeeding season. The randomized complete block design was used with 4 replicates. The results showed that the urea applications were enhancive for both vegetative growth and yield, and in particular the 100g urea/palm was the most satisfactory treatment. Such finding is indicative of the importance of application of even small amounts of nitrogen to increase yield of date palms. |
Keywords: |
Date palm; Urea; Growth; Phoenix dactylifera; Yield. |
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Title: |
Analysis and Research on Insecticidal Effect of 200 mL/m3 Phosphine Fumigation under Nitrogen-rich and Hypoxia |
Authors: |
Yanguang Zhu, Yingwei Yu, Yiming Ma, Ning Qin, Xiaoping Yan, Jinying Chen |
Source: |
International Journal of Latest Research in Agriculture and Veterinary Sciences (IJLRAVS), pp 08 - 17, Vol 01 - No. 02, 2019 |
Abstract: |
This thesis mainly studied the fumigation insecticidal effect of 200mL/m3 phosphine under different hypoxia conditions, the death law of pests and the comparison of drug resistance of different insect species to phosphine. The results showed that the fumigation insecticidal effect of 200mL/m3 phosphine gas under hypoxia with oxygen content of 2%, 3%, 4% and 5% was significantly better than that of 200mL/m3 phosphine gas under constant oxygen, and the average corrected mortality increased by more than 80%;When the oxygen content is more than 3%, the corrected mortality rate of the tested insects increases with the decrease of the oxygen content; When the oxygen content decreases to 3%, the corrected mortality rate reaches the maximum, and the corrected mortality rate of the tested insects decreases while the oxygen content continues to decrease;In terms of time, more than 80% of the tested insects in the hypoxia group were killed within 2 days and almost all died within 3 days; The tolerance to 200mL/m3 phosphine sitophilus oryzae was stronger than that of Rhizopertha dominica under hypoxia. |
Keywords: |
Hypoxic; Phosphine; Fumigation; Corrected Mortality Rate |
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