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首页> 外文会议>21st International congress on irrigation and drainage : Water productivity towards food security. >OPTIMIZATION OF WATER AND NUTRIENT REQUIREMENT FOR YIELD MAXIMIZATION IN HYBRID RICE UNDER DRIP FERTIGATION SYSTEM
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OPTIMIZATION OF WATER AND NUTRIENT REQUIREMENT FOR YIELD MAXIMIZATION IN HYBRID RICE UNDER DRIP FERTIGATION SYSTEM

机译：滴灌施肥条件下杂交水稻产量最大化的水肥需求优化。

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From the above study, it can be concluded that the rice hybrid Co(R)rnField experiments were conducted at central farm, Agricultural College and ResearchrnInstitute, Madurai, during Kharif and Rabi 2008 - 2009 to study the effect of driprnfertigation on growth and yield of hybrid rice. The experiments were laid out inrnfactorial randomized block design with four replications. The treatments consisted ofrntwo irrigation regimes (drip irrigation at 100 % and 150 % PE) and five nutrient levelsrnviz., soil application of 100 % RDF, drip fertigation of 100 % RDF (P as basal, N andrnK as urea and Kcl), drip fertigation of 50, 75 and 100 % RD of P and K (50 % P andrnK as basal remaining N, P and K as WSF + LBF). Drip irrigation was scheduled oncernin two days and fertigation was given once in six days as per the treatment schedule.rnDrip irrigation at 150 % PE exhibited better plant height, number of tillers, leaf arearnindex, root characters and dry matter production in hybrid rice. Similarly, it accountedrnfor higher number of productive tillers per hill, panicle length, number of filled grainsrnper panicle, grain and straw yields. The sterility percentage was also lesser in thisrntreatment.rnAmong the nutrient levels, drip fertigation of 100 per cent RD of P and K (50 % P andrnK as basal remaining, N, P and K as WSF + LBF) registered better plant height,rnnumber of tillers, leaf area index, root characteristics and dry matter production. Yieldrnattributes viz., higher values of number of productive tillers per hill, panicle length,rnnumber of filled grains per panicle, grain and straw yields of hybrid rice found to berncomparable with drip fertigation of 75 per cent of P and K (50 % P and K as basalrnremaining, N, P and K as WSF + LBF)rnThe above treatment also recorded higher N,P and K uptake and lower post harvestrnsoil available N, where as the post harvest soil available P and K were lesser underrndrip fertigation of 50 per cent of P and K (50 % P and K as basal remaining, N, P andrnK as WSF + LBF)rnDrip irrigation at 100 % PE was found to be better than other irrigation regime (150 %rnPE) as for as water use is concerned. It has registered an optimum consumptivernwater use and higher water use efficiency.rnNet return and benefit cost ratio were higher with drip irrigation at 150 % PE with driprnfertigation of 75 per cent of P and K (50 % P and K as basal remaining, N, P and K asrnWSF + LBF). It was followed by drip irrigation at 150 % PE with drip fertigation of 100rnper cent of P and K (50 % P and K as basal remaining, N, P and K as WSF + LBF) H3 responded well to the combination of drip irrigation at 150 % PE with driprnfertigation of 100 per cent of P and K (50 % P and K as basal remaining, N, P and Krnas WSF + LBF) maximizing the yield and gross income. However, drip irrigation atrn150 % PE with drip fertigation of 75 per cent of P and K (50 % P and K as basalrnremaining, N, P and K as WSF + LBF) recorded higher net income compared to otherrntreatments. Hence, drip irrigation at 150 % PE with drip fertigation of 75 per cent of P.
机译：从以上研究可以得出结论，在2008-2009年Kharif和Rabi期间，在中央农业大学，农业学院和马杜赖研究中心进行了水稻杂交Co（R）rnField试验，以研究滴灌施肥对番茄生长和产量的影响。杂交水稻。实验安排了四次重复的无因工厂随机区组设计。处理包括以下两种灌溉方式（100％和150％PE的滴灌）和五种养分含量，土壤施用100％RDF，100％RDF滴灌（P为基肥，N和K为尿素和Kcl），滴灌。 P，K的RD分别为50％，75％和100％（50％P和rnK为基础残留的N，P和K为WSF + LBF）。按处理时间安排，每两天进行一次滴灌，并按处理时间表每六天进行一次施肥。rn在150％PE下滴灌表现出更好的株高，分till数，叶片精氨酸指数，根系特征和干物质生产。同样，它也解释了每座山上生产的分till数量，穗长，每穗的实粒数量，谷物和秸秆产量较高。在养分水平中，在养分水平上，滴灌施肥100％P和K的RD（50％的P和rnK为基础残存，N，P和K为WSF + LBF）表现出更好的株高，数量分till，叶面积指数，根系特征和干物质产量的关系。产量特性表明，杂交稻的滴定施肥可达到P和K的75％（P和K分别为50％和P），从而提高了杂交稻的分till数，穗长，穗的实粒数，杂种的谷类和稻草产量。钾作为基础残留，氮，磷和钾作为WSF + LBF）rn上述处理还记录了较高的氮，磷和钾吸收量，而收获后的土壤有效氮含量较低，其中收获后土壤的有效磷和钾较少的下滴灌施肥量为50 P和K的百分比（剩余的P和K为50％，N，P和rnK为WSF + LBF）rn在100％PE下滴灌比其他灌溉方式（150％rnPE）更好关心。它具有最佳的耗水量和较高的用水效率。净滴水和收益成本比在150％PE的滴灌条件下较高，而滴灌施肥的P和K占75％（剩余的P和K为基础，N， P和K asrnWSF + LBF）。随后在150％PE下进行滴灌，滴灌施肥100％的P和K（基本残留量为P和K的50％，N，P和K为WSF + LBF的水肥）。 150％的PE，滴灌100％的P和K（基本剩余的P和K为50％，N，P和Krnas WSF + LBF），可最大程度地提高产量和总收入。然而，与其他处理相比，在150％的PE和150％的P和K的滴灌施肥下，滴灌的PE净收入较高，其中P和K占基础的50％，N，P和K为WSF + LBF。因此，在150％PE下进行滴灌，滴灌施肥量为P的75％。

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