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Optimizing Plant Spacing under the Systems of.Rice Intensif.cation (SRI)

Agricultural Sciences 2016年第4期7卷 270-278页

作者： Paul Reuben f.edrick C. Kahimba Zacharia Katambara henry f. mahoo Winf.ed Mbungu f.kiri Mhenga Anthony Nyarubamba Muyenjwa Maugo Department of.Agricultural Engineering and Land Planning Sokoine University of Agriculture (SUA) Morogoro Tanzania Department of.Built Environment Engineering Mbeya University of Science and Technology (MUST) Mbeya Tanzania Ministries of.Agriculture Food Security (MAFC) Dar es Salaam Tanzania

Optimum plant spacing is among key agronomic parameters that inf.uence crop growth perf.rmance and crop yield. A study was conducted to investigate the optimum rice transplanting spacing under the Systems of.Rice Intensif.cation (SRI) practice in Tanzania. The study composed of.f.ve treatments of.rice transplanting spacing namely 1) 15 cm × 15 cm (T1);2) 20 cm × 20 cm (T2);3) 25 cm × 25 cm (T3);4) 30 cm × 30 cm (T4);and 5) 35 cm × 35 cm (T5). The experiment was set in a Randomized Complete Block Design (RCBD) and transplanted with unif.rm age of.12 days old seedlings in all treatments. The rice variety tested was TXD 306 Super SARO which was recommended by the Ministry of.Agriculture f.r f.ooded rice in central and eastern Tanzania. Data was collected throughout the two growing seasons (Masika and Vuli) of.2013 and 2014. Data collected include biomass at vegetative, f.owering and harvesting stages, total number of.tillers per hill, number of.productive tillers per hill, number of.grains per panicle and rice grain yield at the end of.the season. Data was analyzed using SAS sof.ware version 9.1. Results have shown that transplanting spacing of.25 cm × 25 cm, 30 cm × 30 cm and 35 cm × 35 cm has signif.cantly perf.rmed better than rice transplanted at 15 cm × 15 cm and 20 cm × 20 cm. f.r the higher perf.rming treatments, 25 cm × 25 cm has perf.rmed much higher than the rest. It is theref.re recommended that f.r rice variety TXD 306 Super SARO under SRI practice in areas with soil conditions similar to Mkindo area in Morogoro Region, the optimum transplanting spacing that gives maximum yield is 25 × 25 cm.

关键词： SRI Transplanting Spacing Biomass Tillers Productive Tillers Hill Treatment Yield

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Inf.uence of.Transplanting Age on Paddy Yield under the System of.Rice Intensif.cation

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Agricultural Sciences 2016年第3期7卷 154-163页

作者： Paul Reuben Zacharia Katambara f.edrick C. Kahimba henry f. mahoo Winf.ed B. Mbungu f.kiri Mhenga Anthony Nyarubamba Muyenjwa Maugo Department of.Agricultural Engineering and Land Planning Sokoine University of Agriculture (SUA) Morogoro Tanzania Department of.Built Environment Engineering Mbeya University of Science and Technology (MUST) Mbeya Tanzania Ministries of.Agriculture Food Security (MAFC) Dar es Salaam Tanzania

Agronomic practices such as transplanting age, plant spacing, and water application regimes in irrigated paddy production can have a signif.cant impact towards the perf.rmance in rice growth and yield. A study was conducted to investigate the optimum transplanting age f.r maximum rice productivity under the systems of.rice intensif.cation (SRI) technology. The study treatments adopted were three representing 8, 12 and 15 days old seedlings replicated 3 times each. The experiment was set in randomized complete block design (RCBD) and transplanted at spacing 25 cm × 25 cm between rice hills. The rice variety tested was TXD 306 Super SARO, which was recommended by the ministry of.Agriculture in Tanzania. Data was collected throughout the growing season in two mixed short rains and dry season of.September 2013/2014 and September 2014/2015. Data collected included biomass at vegetative, f.owering and harvesting stages, total number of.tillers per hill, number of.productive tillers per hill, number of.grains per panicle and rice grain yield at the end of.the season. Data was analyzed using SAS sof.ware version 9.1. The results suggested that transplanting at younger age of.8 to 12 days was recommended f.r Mkindo area in Mvomero Distirct, and other areas with similar soil conditions and agro ecological characteristics.

关键词： SRI Transplanting Age Biomass Tillers Productive Tillers Hill f.eld Treatment Yield

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Adopting the system of.rice intensif.cation (SRI) in Tanzania: A review

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Agricultural Sciences 2013年第8期4卷 369-375页

作者： Zacharia Katambara f.ederick C. Kahimba henry f. mahoo Winf.ed B. Mbungu f.kiri Mhenga Paul Reuben Muyenjwa Maugo Anthony Nyarubamba Department of.Agricultural Engineering and Land Planning Sokoine University of Agriculture Morogoro Tanzania Department of.Civil Engineering Mbeya University of Science and Technology Mbeya Tanzania Directorate of.Irrigation Ministry of Agriculture Food Security and Cooperatives Morogoro Tanzania

The demand of.water f.r irrigation purposes in Tanzania outstrips the amount of.water available f.r irrigation and other demands. On the other hand, the demand f.r more f.od to f.ed the growing population is increasing, calling f.r the need to have technologies and f.rming practices that ensure more f.od production while minimizing water uses. Rice is among cereal crops grown in Tanzania, and it can assist in meeting the f.od demand f.r the nation. Majority of.rice producers in Tanzania and Sub-Saharan Af.ica(SSA) are subsistence f.rmers and they practice continuous f.ooding, a technique that requires much water. In addition to using large amounts of.water, the conventional practices of.growing paddy using local varieties transplanting process are implemented when seedlings are more than 21 days old, and 3-4 seedlings are transplanted in one hole. This practice results in low yields, and low water productivity and water use ef.iciency. The system of.rice intensif.cation (SRI) on the other hand, is a promising new practice of.growing paddy rice that has proven to be very ef.ective in saving water and increasing rice yields in many parts of.the world. SRI practice is spreading f.st and it has been adopted in many countries. The SRI practice has been introduced in Tanzania during the last 3 years as such it is not widely practiced. This paper reviews SRI practice at global, regional and country (Tanzania) level, and evaluates the challenges, opportunities and implications f.r its adoption in Tanzania. Knowledge gaps at each level have been identif.ed and discussed as well as suggestions f.r researchable areas.

关键词： System of Rice Intensif.cation Rice Production Paddy Alternate Wetting and Drying

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Ef.ect of.Eucalyptus expansion on surf.ce runof. in the central highlands of.Ethiopia

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Ecological Processes 2017年第1期6卷 1-8页

作者： Daniel Jaleta Bonif.ce P.Mbilinyi henry f.mahoo Mulugeta Lemenih Department of.Engineering Sciences and Technology Sokoine University of AgricultureP.O.Box 3003MorogoroTanzania Department of.f.restry and Natural Resource Farm AfricaP.O.Box 5746Addis AbabaEthiopia

Introduction:Land use/land cover change can af.ect the ecological processes of.an area such as hydrological *** change in the condition of.water resources of.an area could be a good indicator of.changes in ecosystem f.nction as a result of.altered land use/land *** expansion in central Ethiopia is one of.the recent land use/land cover changes causing controversy on its potential ecological *** study was designed to evaluate ef.ects of.three adjacent land uses/land covers,*** land,grassland and Eucalyptus woodlot on surf.ce runof. in Meja River watershed,central ***:The rainf.ll amount at each study catchment was collected using the rain gauge installed to record daily rainf.ll *** three land use/land cover types in each study catchment were selected f.r comparison as *** replications of.each land use/land cover were used f.rming a total of.12 runof. *** rainf.ll and runof. data were collected twice a day f.r 91 ***:The study f.und that land use/land cover signif.cantly af.ects surf.ce runof. generated f.om the *** runof. was recorded f.om cultivated *** was no signif.cant dif.erence on runof. volume between grassland and Eucalyptus ***:This shows that expansion of.Eucalyptus on grassland could not have signif.cant impact on surf.ce runof. generation but if.planted on previously f.rmland could reduce surf.ce runof..

关键词： Cultivated land Grassland Runof. plots Land use Meja River watershed

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The Inter-Annual Variability of.Rainf.ll Onset and Its Implication on Crop Planting in Selected East Af.ica Countries

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American Journal of.Climate Change 2023年第2期12卷 268-291页

作者： Isack Baliyendeza Yonah Philemon henry King’uza Ladislaus Benedict Chang’a Mecklina Merchades Babyegeye henry f.tael mahoo Agnes Lawrence Kijazi Tanzania Meteorological Authority (TMA) Dar es Salaam Tanzania Sokoine University of.Agriculture (SUA) Morogoro Tanzania World Meteorological Organization (WMO) Addis Ababa Ethiopia

The inter-annual variability of.rainf.ll onset and crop replanting in East Af.ica (EA) was assessed using daily estimated rainf.ll data f.om climate hazard group inf.ared precipitation (CHIRPS Ver2.0) and monthly Sea Surf.ce Temperature (SST) indices [Indian Ocean Dipole (IOD) and El-Ni?o Southern Oscillation (ENSO) at NINO3.4 region] f.om the National Center f.r Environmental Prediction (NCEP) and the National Center f.r Atmospheric Research (NCAR). The data covered a period of.40 years f.om1981 to 2020. The methods of.cumulative of.daily mean rainf.ll, percentage of.onset date departure (PODD), Mann-Kendall (MK) trend test, student t-test, and correlation were applied in the analysis. The results showed that early onset with dry spell (WDS) consideration f.equently occurs in Uganda between the f.rst and second dekads of.September, while late rainf.ll onset WDS occurs in the f.rst and second dekads of.December over central and Northern Kenya as well as in the Northeastern highlands, parts of.the northern coast and unimodal regions in Tanzania. Rainf.ll onset with no dry spell (WnDS) portrayed an average of.10 days bef.re the occurrence of.true onset WDS, with maximum onset departure days (ODD) above 30 days across the Rif. Valley area in Kenya and the Northeastern highlands in Tanzania. The high chance of.minimum ODD is seen over entire Uganda and the area around Lake Victoria. However, f.w regions, such as Nakuru (Kenya) Gulu and Kibale (Uganda), and Gitega (Burundi), revealed a slight positive linear trend while others showed negative trend. Signif.cant positive patterns f.r correlation between onset WDS and SST indices (IOD and NINO 3.4) were discovered in Northern and Northeastern Kenya, as well as areas along the Indian Ocean (over Tanzania’s Northern Coast). Inter-annual relationship between onset dates WDS and IOD (NINO3.4) indices exhibits a high correlation coef.icient r = 0.23 (r = 0.48) in Uganda and r = 0.44 (r = 0.36) in Kenya. On the other hand, a neg

关键词： Inter-Annual Variability Rainf.ll Onset Crop Planting East Af.ica

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南风

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少年人生 2004年第12期 1-1页

作者： mahoo

有南风来,兔子耳朵,北向而立,草叶嗖嗖响。寻一颗未芽的籽,门齿啮去皮壳,没甚味道,

关键词：皮壳给你

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