摘要
为了解古田山区大白菜N,P,K施用效果,建立古田土壤大白菜养分丰缺指标,本研究进行了9组大白菜‘3414’肥效试验。结果表明:在现有土壤养分肥力水平下,施用N,P,K肥料依然是提高古田县大白菜产量和增加经济效益的主要措施。施用N,P,K化肥分别平均增产37.1%,11.5%,17.4%;施用每公斤N,P,K养分分别增加经济效益186.6,145.2,109.4元。N,P2O5,K2O的产投比分别为35.9∶1,26.9∶1,20.3∶1。大白菜土壤低肥力等级N,P,K养分临界指标含量分别为<131.4 mg/kg,<8.9 mg/kg,<59.9 mg/kg;大白菜土壤高肥力等级N,P,K养分临界指标分别为>189.9 mg/kg,>43.4 mg/kg,>159.4 mg/kg。全县大白菜平均最高产量的N,P,K施用量为(231.01±69.95),(56.59±34.09),(198.7±40.63)kg/hm2;最佳经济产量的N,P,K施用量为(222.13±64.28),(52.69±30.97),(188.55±33.27)kg/hm2。研究结果为当地大白菜因土施肥提供了科学依据。
In order to understand the application effects of nitrogen （N）, phosphorus （P） and potas- sium （K） on cabbage in Gutian mountain area and establish cabbage soil fertility indicators, nine groups of cabbage ＇ 3414 ＇ fertilizer experiment were conducted. The results showed that ： Under the existing soil fertility levels, applying N, P and K fertilizers was the major measure to improve the yield of Chinese cabbage and increase the economic benefit in Gutian. Applying N, P and K fertilizers in- creased the average yields by 37.1%, 11.5% and 17.4%, respectively; Applying 1 kg N, P and K fertilizers increased the economic benefit by 186.6, 145.2, 109.4 Yuan. The input-output ratios of N, Pz 05, K20 were 35.9： 1, 26.9：1 and 20. 3 ： 1, respectively. The cabbage low soil fertility levels of N, P and K nutrient contents were critical index 〈 131.4 mg/kg, 〈 8.9 mg/kg and 〈 59.9 mg/kg and the high fertility levels of the soil N, P and K nutrient contents were 〉 189.9 mg/kg, 〉43.4 mg/ kg and 〉 159.4 mg/kg. The highest average yields with applying N, P and K fertilizers were （231.01 ± 69.95）, （56.59 ± 34. 09 ）, （ 198.7 ± 40. 63 ） kg/hm2 ; The optimum economic yields were （222. 13± 64. 28）, （52. 69±30.97）, （188.55 ± 33.27） kg/hm2. The study provides a seien- title basis for local cabbage soil fertilization.
出处
《云南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第3期477-483,共7页
Journal of Yunnan Agricultural University:Natural Science
基金
2006年国家测土配方施肥补贴项目[农业部.财政部办公厅(农办财2006)11号]
关键词
大白菜
氮
磷
钾
Chinese cabbage
nitrogen （N）
phosphorus （P）
potassium （K）
