摘要
试验将多年生黑麦草第1、2、3刈留茬高度分别作为试验因素,分高低留茬(10cm、4cm)两个水平,研究了变换留茬高度对再生长、产量和品质的影响。结果表明:各次刈割留茬高低仅影响所刈当次收获牧草及紧接其后的再生草,各刈留茬高度间不表现互作效应。与低留茬相比,再生长方面,高留茬利于再生,初夏期更明显。品质方面,高留茬当次收获牧草的品质稍好,但再生草的品质显著较差,影响程度随刈次数增加而加大。产量方面,高留茬减少当次收获的产量,增加紧接其后再生草的产量,增(减)产的绝对量随刈次增加而降低,相对量则随刈次增加而提高。就不同处理总产量而言,第1刈低留茬的显著高于高留茬。综合考虑各刈留茬高度的效应,在南京地区多年生黑麦草各刈留茬高度依次以4、7、10、10cm为宜。
For studying the effects of varying cutting heights on regrowth, yields, and quality of perennial ryegrass (Lolium perenne L.), the 1st, 2nd and 3rd cutting heights were considered as experimental factors at two levels (10cm, 4cm) respectively in this experiment during 1987—1988. The results showed that only the current and nest crops were influenced by cutting heights at different times, and no significant interactions were observed between each cutting height. Compared with the low cutting, high cutting was more favorable for regrowth, especially in early summer. Herbage quality of high cutting was slightly better than that of low cutting, while nutritive value of the next crop after high cutting was significantly inferior to that after low cutting. The relative differences in herbage quality between high and low cutting enlarged with the cut number. High cutting at the current crop gave lower yields, but higher at the next crop. the absolute differences diminished and relative differences enlarged between high and low cutting with the number. At all treatment, the total yields were extremely higher at the 1st cut in low cutting than in high cutting. 4, 7, 10, and 10cm cutting height of perennial ryegrass for each cut successively were suggested in Nanjing area.
出处
《草业科学》
CAS
CSCD
北大核心
1991年第4期63-68,共6页
Pratacultural Science
关键词
黑麦草
再生长
产量
品质
留茬
varying cutting height
Perennial ryegrass
Regrowth
Yield
Quality
