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正确地掌握牧草产量,固然关系到草地牧草的试验研究,但对于载畜量的确定,放牧计划的制定等草地的管理利用,也是极为重要的。当前一般根据刈割样方,采用称重量来确定牧草产量。样方刈割法如操作仔细,也还是测定牧草产量的最正确方法。但是使用样方刈割法需要选取许多的测点(当刈割面积为1米~2,要求可靠性为95％,测定误差率为10％时,在1米~2的样方范围内的变异系数(C·V)为17％的极为均匀的草地上,最少也要刈割12个点;C·V为33％时为44个点;而对C·V为50％的放牧地来说,必须选择100个点),为此需要耗费很大的劳力和许多的时间。当前在实际操作中,一般采用降低测定精度以减少刈割点数。再者,使用样
Correct understanding of pasture production, although related to the grassland pasture research, but for the determination of stocking, grazing plan formulation and other grassland management and utilization is also extremely important. The current general according to the clipped quadrats, weighed to determine the forage production. If the mowing method is used carefully, it is also the most accurate way to measure the yield of pasture. However, the use of quadrilateral mowing method need to select a number of measuring points (when the cutting area of 1 m ~ 2, the required reliability of 95%, the measurement error rate of 10%, 1 m ~ 2 in the quadrat range A minimum of 12 points should also be mowed on very uniform grass with a coefficient of variation (C · V) of 17%; 44 points at 33% for C · V; and 50% for C · V Say, you must choose 100 points), for which it takes a lot of labor and a lot of time. Currently in practice, generally reduce the measurement accuracy to reduce the number of points. Again, use the sample