摘要
通过研究化肥减量配施猪粪堆肥对油松(Pinus tabuliformis)生长、养分吸收和土壤肥力的影响,为连作苗圃土壤培肥和培育优质壮苗提供依据.试验在田间条件下,设置不施肥对照(T1)、单纯施用化肥(T2)、化肥+300 g.m-2 猪粪堆肥(T3)、化肥+600 g.m-2 猪粪堆肥(T4)、化肥+900 g.m-2 猪粪堆肥(T5)共5个处理,3次重复.结果表明:化肥添加猪粪堆肥可促进油松生长,其中T4 与对照相比株高、地径及根、茎、叶干重分别提高了 62.10%、56.82%、88.46%、146.67%、107.14%;T2、T3、T4与对照相比均可提高油松根、茎、叶的氮、磷、钾积累量,T4总氮、总磷、总钾分别较对照提高了136.79%、270.19%、184.31%;各施肥处理均可提高油松根际土氮、磷、钾养分含量,其中T4碱解氮、速效磷和速效钾含量分别较对照提高了38.81%、136.12%、29.77%.化肥减量配施600 g.m-2猪粪堆肥有利于提高油松根际土养分含量,促进植株生长和提高养分积累量.
Abstract
The effects of chemical fertilizer reduction combined with pig manure compost on the growth,nutrient absorption,and soil fertility of Pinus tabuliformis were studied to provide a theoretical basis for soil fertilization and cultivating high-quality and strong seedlings in continuous cropping nurseries.The test under field conditions,and then set up 5 treatments include no fertilizer control(T1),simply using chemical fertilizers(T2),fertilizer+300 g.m-2 pig manure compost(T3),fertilizer+600 g.m-2 pig manure compost(T4),and fertilizer+900 g.m-2 pig manure compost(T5),each treatment was repeated 3 times.The results showed that:the addition of pig manure compost to chemical fertilizers could promote the growth of Pinus tabuliformis,and the plant height,ground diameter,root,stem,and leaf dry weight of T4 was 62.10%,56.82%,88.46%,146.67%,and 107.14%higher than control respec-tively.T2,T3,T4 could increase the accumulation of nitrogen,phosphorus,and potassium in the roots,stems,and leaves of Pinus tabuliformis compared to the control.Compared with the control,the total nitrogen,total phos-phorus and total potassium of T4 were increased by136.79%,270.19%,and 184.31%,respectively.All fertilization treatments could increase the nitrogen,phosphorus,and potassium nutrient content in the rhizosphere soil of Pinus tabuliformis,and the contents of alkali-hydrolyzable nitrogen,available phosphorus and available potassium in T4 were 38.81%,136.12%and 29.77%higher than those in the control,respectively.The results of this study showed that the reduction of chemical fertilizer combined with 600 g.m-2 pig manure compost was beneficial to increase the nutrient content of rhizosphere soil of Pinus tabuliformis,promote plant growth and increase nutrient accumulation.
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