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首页> 外文期刊>The Philippine Agricultural Scientist >Performance of Recycled Hybrid Rice [Oryza sativa L. cv. PSB Re 72H (Mestizo 1)] under Two Levels of Nitrogen
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Performance of Recycled Hybrid Rice [Oryza sativa L. cv. PSB Re 72H (Mestizo 1)] under Two Levels of Nitrogen

机译：再生杂交稻的性能[Oryza sativa L. cv。两种氮水平下的PSB Re 72H（Mestizo 1）

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摘要

The F_1 hybrid and two advanced generations (F_2 and F_3) of a hybrid rice variety, PSB Rc 72H (Mestizo 1), were grown under two levels of nitrogen (50 kg N ha~(-1) and 100kg N ha~(-1)) during the wet season of 2005 at the experimental lowland farm ofthe University of the Philippines Los Banos. The treatments were laid out using factorial arrangement in randomized complete block design (RCBD) with three replications. Regardless of generation, plants fertilized with 100 kg N ha~(-1) were significantly taller, reached 50% heading earlier and had longer panicles than those fertilized with 50 kg N ha~(-1). The F_2 generation was significantly shorter than the F_1 hybrid, approached 50% heading later by more than one day, and had lower 1000-grain weight. However, the F_1 hybrid had statistically the same number of tillers and panicles per plant, length of panicle, number of spikelets per plant, number of filled spikelets per plant, harvest index and grain yield as the F_2 generation. The F_3 generationwas as tail as the F_1 hybrid, had also statistically the same number of tillers and panicles per plant, length of panicle, number of spikelets and filled spikelets per panicle as the F_1 hybrid. The F_3 generation reached 50% heading significantly later by more than two days, and had significantly lower 1000-grain weight, harvest index and grain yield than the F_1 hybrid. The number of filled spikelets per panicle, 1000-grain weight and harvest index were closely associated with grain yield. The F_2 generation of PSB Rc 72H (Mestizo 1) might be recycled but the F_3 generation is definitely non-recyclable. Increasing the N level did not alleviate yield depression.
机译：在两个氮水平下（50 kg N ha〜（-1）和100kg N ha〜（-）在两个氮素水平下培育F_1杂交种和杂交水稻新品种PSB Rc 72H（Mestizo 1）的两个高级世代（F_2和F_3）。 1））在菲律宾大学Los Banos的实验性低地农场的2005年雨季期间。采用因子安排在三联重复的完全随机区组设计（RCBD）中布置治疗方案。不论年代如何，与50 kg N ha〜（-1）施肥的植物相比，施肥100 kg N ha〜（-1）的植物明显更高，抽穗期提前50％，穗花更长。 F_2代明显短于F_1代，在超过一天的时间内达到了50％的抽穗，并且具有较低的1000粒重。但是，F_1杂种在统计学上与F_2代具有相同的分till和穗数，穗长，每株小穗数，每株已填充小穗数，收获指数和谷物产量。 F_3代与F_1杂种一样尾巴，在统计学上也与F_1杂种具有相同的分plant和穗数，穗长，穗数和穗粒数。 F_3代在两天多以后明显达到抽穗期的50％，并且与F_1杂种相比，F_3代的千粒重，收获指数和籽粒产量明显降低。每穗的实心小穗数量，1000粒重和收获指数与谷物产量密切相关。 F_2代的PSB Rc 72H（Mestizo 1）可以回收，但F_3代肯定是不可回收的。氮含量的增加并不能减轻产量的下降。

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