The objective of the work was to evaluate the chemical composition and production of dry matter and seed in five genotypes of ryegrass subjected to different number of cuts, with emphasis on growing dual purpose. The experimental delineation was adopted in blocks at random, with four repetitions and the treatments were distributed in factorial scheme 5 x 5 (genotypes x number of cuts). Was used five genotypes: Comum, So Gabriel, Estanzuela 284, Avance and INIA Titn and five cut number (one, two, up to five cuts). A significant interaction (P < 0.05) genotype x number of cut for all the variables studied was observed. The increase in the number of cuts ordered greater accumulation of total dry matter (leaves and stems), but lower seed production for all genotypes studied. The response of the chemical composition of dry matter varied depending on the genotype and the number of cuts. The increase in the number of cuts promoted lower crude protein content of leaf and stem for all genotypes studied. The genotypes showed quadratic answer to the contents of neutral detergent fiber of leaves, and the lowest level was observed when there were up to three cuts. Aiming the dualpurpose, you must choose from two to three cuts, given a good production of dry matter to animals but also promoting a seed production satisfactory.
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机译：这项工作的目的是评估遭受不同切割次数的五种黑麦草基因型的化学组成以及干物质和种子的产量，并着重于双重用途。实验划分是随机进行的，每组有四个重复，并且处理以因子分解方案5 x 5（基因型x切割数）分配。使用了五种基因型：Comum，So Gabriel，Estanzuela 284，Avance和INIA Titn，以及五种切割编号（一，二，最多五种切割）。对于所有研究的变量，观察到显着的交互作用（P <0.05）基因型x切割数。切块数量的增加使总干物质（叶和茎）的积累量增加，但所有基因型的种子产量均降低。干物质化学组成的响应随基因型和切块数而变化。对于所有研究的基因型，切痕数量的增加促使叶片和茎的粗蛋白含量降低。基因型对叶片中性清洁剂纤维的含量表现出二次响应，而在多达三个切口时，观察到的水平最低。为了达到双重目的，您必须从两到三个切口中进行选择，既要使动物获得良好的干物质产量，又要使种子的产量令人满意。
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