THE CATTLE DUNG PATCH
THE CATTLE DUNG PATCH
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牛粪地
DOI：
10.1111/j.1365-2494.1972.tb00684.x
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发表时间：
1972
影响因子：
2.4
通讯作者：
B. Watkin
中科院分区：
文献类型：
--
作者：
B. N. Macdiarmid;B. Watkin
在两个随机区组实验中跟踪了直径 1 英尺（0.30 m）的粪块对奶牛牧场产量和植物成分的影响。实验区由围绕每个粪便块的 3 个同心环组成，直径为 2 英尺（0.61 m），称为 R2； 3 英尺（0.91 m），称为 R3；和 4 英尺（1.22 m），称为 R4。它们被依次收获。
在第一个实验中，每个粪块周围的草种（主要是黑麦草）总产量显着增加。这种增加首先在 R2 中明显出现，但逐渐向外扩散，并且在 R4 中仍然可以检测到。
植物材料，特别是三叶草成分，在粪块下面迅速腐烂。在牧场上留下一块粪便15天，就会杀死75%的草蘖和三叶草匍匐茎的根节；因此，当粪便块被移除时，会导致该块区域的牧草再生显着减少。
第二个实验包括三种落叶处理，即。 1. 将所有三个环定期切割至 1 英寸（2.54 厘米）； 2. 将 R2 切成 21/2 英寸（6.35 厘米），将 R3 和 R4 切成 1 英寸（2.54 厘米）； 3.防治不落叶。
在所有三种处理中，在整个实验过程中，粪便斑块周围的草的总产量都有显着增加。增加仅限于 R2，但 14 周后仍然明显。实验期间最大的累积产量来自接受最密集落叶处理的粪块周围。
The eifect of 1 ft-diameter (0.30 m) dung patches on the yield and botanical composition of a dairy pasture was followed in two randomized-block experiments. Experimental plots consisted of 3 concentric rings round each dung patch of diameter 2 ft (0.61 m), called R2; 3 ft (0.91 m), called R3; and 4 ft (1.22 m), called R4. They were sequentially harvested.
In the first experiment described there was a significant increase in the total yield of grass species, predominantly ryegrasses, around each dung patch. This increase was first evident in R2 but spread progressively outward and was still detectable in R4.
Plant material, particularly clover components, decayed rapidly beneath the dung patches. Leaving a dung patch on the pasture for 15 days kiUed 75% of the grass tillers and the rooted nodes of clover stolons; thus causing a significant reduction in pasture regrowth from the patch area when the dung patch was removed.
The second experiment included three defoliation treatments, viz. 1. Cut regularly to 1 in. (2.54 cm) in all three rings; 2. Cut to 21/2 in. (6.35 cm) in R2 and 1 in. (2.54 cm) in R3 and R4; 3. Control undefoliated.
In all three treatments there was a significant increase throughout the experiment in total yield of grasses around the dung patchy. The increase was confined to R2, but was still evident after 14 weeks. The greatest cumulative yield during tbe period of the experiment came from around the dung patches receiving the most intensively defoliated treatment.