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  • 简介:Theeffectsofnitrogen,phosphorusandpotassiumapplicationlevel,seedrateandtransplantingdensityonthegrowthanddevelopmentofriceplantswerestudiedtofindoutnutrientstatusinhigh-yieldingriceplantsandtoincreasegrainyieldbyadequatefertilization.Therewasanequilibriumrelationshipamongnutrientelementsforhigh-yieldingriceplantpopulations.Theequilibriumindexofnutrientamount,contentanddistributioninhigh-yieldingriceplantsshouldbegenerallygreaterthan-2butlessthan2.Theoptimumnutritiveproportionofnitrogen:phosphorus:potassiumassimilatedbytheplantswasabout10:2:9attheripeningstage.Butthecontentandtheproportionvariedwiththegrowthstages,Therefore,thenutrientinriceplantpopulationsshouldbeinadynamicequilibrium.Soastoachievehighyield.

  • 标签: 水稻 作物群体 高产 营养平衡