摘要
采用过磷酸钙与氯化钾进行2因素4水平随机区组施肥试验,结果表明:过磷酸钙600kg hm2与氯化钾100kg hm2施肥处理,苜蓿鲜草产量最高,较对照增产20 0%,纯收入增988元 hm2。新复极差测验表明:不同水平施用过磷酸钙各次刈割鲜草产量及鲜草总产量间差异均达到显著水平(P<0 05),且随着过磷酸钙用量的增加鲜草产量相应地增加。不同水平施用氯化钾与不施氯化钾鲜草总产量差异均达到极显著水平(P<0 01),但施氯化钾150kg hm2与50kg hm2鲜草总产量差异不显著;随着施用氯化钾水平的提高,各次刈割鲜草产量及鲜草总产量均呈先升高后略有下降的趋势,氯化钾施用量以100kg hm2为宜。氯化钾、过磷酸钙及其互作效应均以第1次刈割显著,第2次刈割施肥效应均有所下降,其中氯化钾及氯化钾与过磷酸钙互作效应下降更为明显。增施氯化钾有利于提高苜蓿粗蛋白含量,但粗蛋白含量不随施用量的增加而增加;施过磷酸钙200kg hm2苜蓿粗蛋白含量最高,施400kg hm2苜蓿粗蛋白含量下降。
A fertilizer application experiment was carried out using a randomized blocks design with 2 factors and 4 levels, applying superphosphate and potassium chloride Under the experimental conditions, the greatest alfalfa fresh forage yield was obtained with the fertilizer application treatment of 600 kg/hm2 superphosphate and 100 kg/hm2 potassium chloride Compared with the control, this treatment increased fresh forage yield by 200%, and the net income increased $988 yuan/hm2 With the different superphosphate application rates, the differences between means of the first and second fresh forage harvest yields, and between the total harvest yields all reached the significance level p<005 As the fertilizer rate increased, the yields also increased proportionally With different rates of potassium chloride application, total fresh forage yield differences between applying and not applying the fertilizer were all very significant (p<001) With the increase in application rate of potassium chloride, the fresh forage yields increased and then slightly decreased However, total yield differences between application rates of 50 kg/hm2 and 150 kg/hm2 were not significant The optimum rate was 100 kg/hm2 The effects of superphosphate, potassium chloride, and their combinations were more marked in yields of the first harvest than in yields of the second harvest The drop in effect was more evident with potassium chloride and the combination of superphosphate with potassium chloride than with superphosphate Increasing the application rate of potassium chloride was favorable in increasing crude protein content of alfalfa, but protein content did not increase proportionally with increasing potassium chloride Crude protein content was highest at 200 kg/hm2 superphosphate, but at 400 kg/hm2 superphosphate, crude protein content dropped
出处
《草业科学》
CAS
CSCD
2003年第11期19-22,共4页
Pratacultural Science
关键词
苜蓿
过磷酸钙
氯化钾
鲜草产量
粗蛋白含量
alfalfa
superphosphate
potassium chloride
fresh forage yield
crude protein content
