摘要
对江汉平原地区涝渍地特高黑麦草Lolium multiflorum进行测土配方施肥及刈割留茬高度对照试验。土壤测定表明:耕作层有机质含量23.65 g/kg、碱解氮105.23 mg/kg、速效磷6.69 mg/kg、速效钾132.55 mg/kg。以此确定各组施肥比例,试验Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ组施入总氮分别为75、150、225、300、375kg/hm2;施入P2O5与K2O相同,分别为30、60、90、120、150 kg/hm2。试验Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ组全期产量分别为55.35、59.61、67.87、69.08、67.76 t/hm2。结果表明:特高黑麦草产量随着化肥用量增加呈先升高后降低趋势;第Ⅳ组的产量最高,达69.08 t/hm2,经方差分析,与试验Ⅰ、Ⅱ组的差异显著(P<0.05),与Ⅲ、Ⅴ组的差异不显著(P>0.05)。留茬试验分为Ⅰ、Ⅱ、Ⅲ、Ⅳ组,留茬高度分别是2、4、6和8 cm,各组全期产量分别为54.91、63.30、56.08、54.28 t/hm2;结果表明:第Ⅱ组的总产量最高,经方差分析,与Ⅰ、Ⅲ、Ⅳ组的总产量差异显著(P<0.05),而Ⅰ、Ⅲ、Ⅳ组之间的总产量差异不显著(P>0.05)。
Lolium multiflorum cv. Tegao growing in waterlogged land of Jianghan plain was applied formulated fertilizer and cutting test. The soil tests showed that tilth contained 23.65 g/kg organic matter, 105. 23 mg/kg alkali-hydrolysable nitrogen, 6. 69 mg/kg available phosphorus, 132. 55 mg/kg available K. Based on the soil test results, fertilizing proportion of each group was determined. 75, 150, 225, 300, and 375 kg/hm Total N was applied to each group respectively; P2O5 and K2O were applied with the same amount of for each group, i. e. , 30, 60, 90, 120, 150 kg/hm^2. The total yield of annual ryegrass was 55.35, 59.61, 67.87, 69.08 and 67.76 t/hm^2 for each group, respectively, which indicated that the yield of group Ⅵ was the highest and had significant difference（P 〈0. （55） from group Ⅰ and Ⅱ, no remarkable difference was observed among group Ⅲ, Ⅳand Ⅴ（P〉 0.05）. Cutting height experiment showed that with 2, 4, 6 and 8 cm cutting height, the yield was 54.91,63.30, 56.08, 54.28 t//hm^2 respectively, which indicated that group Ⅱ had the highest yield and had significant difference from group Ⅰ,Ⅲ and Ⅳ（P〈0. 05）, no significant difference was observed among group Ⅰ,Ⅲ and Ⅳ（P〉0. 05）.
出处
《草业科学》
CAS
CSCD
2007年第11期50-52,共3页
Pratacultural Science
关键词
涝渍地
人工草地
模式化栽培
waterlogged land
artificial pasture
model cultivation
