CAJ | 학술논문

在建立饱和及土水比1∶5（m∶v）条件下ECe与EC1∶5相关关系的基础上，建立EC1∶5的土壤盐分分级指标，评价了传统管理条件下设施越冬长茬和春茬的土壤盐分动态。结果表明：设施菜田土壤ECe与EC1∶5呈极显著正相关，在京郊土壤条件下换算公式为EC1∶5=0.105ECe；果类蔬菜中茄子和辣椒属敏感蔬菜作物，苗期和全生育期耐盐性根层土壤EC1∶5临界值分别为0.10dS·m-1和0.30dS·m-1，当季根层土壤EC1∶5可接受调控范围为0.30～0.50dS·m-1；番茄和黄瓜属非敏感蔬菜作物，苗期和全生育期耐盐性根层土壤EC1∶5临界值分别为0.30dS·m-1和0.60dS·m-1，当季根层土壤EC1∶5可接受调控范围为0.60～0.90dS·m-1；日光温室越冬长茬土壤EC1∶5均值从定植至翌年3月一直稳定在0.30～0.34dS·m-1之间，之后逐渐下降，7月降至0.15dS·m-1；塑料大棚春茬定植后根层土壤EC1∶5逐渐下降，4月之前为0.29～0.30dS·m-1，7月降至0.20dS·m-1；结合蔬菜作物耐盐指标发现，传统管理条件下日光温室越冬长茬和塑料大棚春茬蔬菜作物在苗期易出现盐害问题；越冬长茬敏感蔬菜作物从定植至翌年3月期间，土壤盐度易超过其耐盐临界值，需要合理水肥调控以防盐害。
재건립포화급토수비1∶5（m∶v）조건하ECe여EC1∶5상관관계적기출상，건립EC1∶5적토양염분분급지표，평개료전통관리조건하설시월동장치화춘치적토양염분동태。결과표명：설시채전토양ECe여EC1∶5정겁현저정상관，재경교토양조건하환산공식위EC1∶5=0.105ECe；과류소채중가자화랄초속민감소채작물，묘기화전생육기내염성근층토양EC1∶5림계치분별위0.10dS·m-1화0.30dS·m-1，당계근층토양EC1∶5가접수조공범위위0.30～0.50dS·m-1；번가화황과속비민감소채작물，묘기화전생육기내염성근층토양EC1∶5림계치분별위0.30dS·m-1화0.60dS·m-1，당계근층토양EC1∶5가접수조공범위위0.60～0.90dS·m-1；일광온실월동장치토양EC1∶5균치종정식지익년3월일직은정재0.30～0.34dS·m-1지간，지후축점하강，7월강지0.15dS·m-1；소료대붕춘치정식후근층토양EC1∶5축점하강，4월지전위0.29～0.30dS·m-1，7월강지0.20dS·m-1；결합소채작물내염지표발현，전통관리조건하일광온실월동장치화소료대붕춘치소채작물재묘기역출현염해문제；월동장치민감소채작물종정식지익년3월기간，토양염도역초과기내염림계치，수요합리수비조공이방염해。
The electrical conductivity(EC)of different extracts(saturated extract and 1∶5 of soil and water ratio extract)were tested,and the relationship between ECe and EC1∶5 was established in this study. Therefore,the soil standardized classification of EC1∶5 was also established.Besides,the study evaluated the soil salinity dynamic of overwinter and spring facility vegetables under conventional management.The results indicated that the soil ECe and EC1∶5 of facility vegetable fields showed significant and positive correlated linear relationship.Under the soil conditions at Beijing suburbs the reduction formula was EC1∶5 =0.105 ECe. The critical value of soil EC1∶5 at salt tolerant root layer for sensitive fruity vegetables(eggplant and pepper) during seedling stage and the whole growing period were 0.10 dS·m-1 and 0.30 dS·m-1,respectively.And the adjustable value was between 0.30 dS·m-1 and 0.50 dS·m-1.For non-sensitive vegetables(tomato and cucumber)the critical value of soil EC1∶5 at salt tolerant root layer during seedling stage and the whole growing period were 0.30 dS·m-1 and 0.60 dS·m-1,respectively.And the adjustable value was between 0.60 dS·m-1 and 0.90 dS·m-1.The average soil EC1∶5 value in solar greenhouse from planting to next March in over-winter season was stable between 0.30-0.34 dS·m-1,and then declined gradually till July to 0.15 dS·m-1.In the plastic shed for spring season,the soil EC at root layer declined after planting,and it was 0.29-0.30 dS·m-1 before April. It dropped to 0.20 dS·m-1 till July.According to vegetable salt tolerance index,we found that under traditional management condition,the overwinter vegetables in solar greenhouse and spring vegetables in plastic shed were easily suffered from soil salt damage.For overwinter sensitive vegetables during the Period from seedling to next March,the soil salinity was inclined to exceed its critical value of salt tolerance.Reasonable adjustment between water and fertilizer was needed so as to control the salt damage.