中国土壤与肥料
中國土壤與肥料
중국토양여비료
SOIL AND FERTILIZER SCIENCES IN CHINA
2015年
2期
44-48
,共5页
蔡利华%陈玲%贡万辉%张玉萍%水涌%刘红%张冬梅
蔡利華%陳玲%貢萬輝%張玉萍%水湧%劉紅%張鼕梅
채리화%진령%공만휘%장옥평%수용%류홍%장동매
滴灌棉田%棉花根系分布%土壤有效氮磷钾%养分分布
滴灌棉田%棉花根繫分佈%土壤有效氮燐鉀%養分分佈
적관면전%면화근계분포%토양유효담린갑%양분분포
drip irrigation cotton field%cotton root distribution%soil available nitrogen phosphorus and potassium%nutrient distribution
为了解滴灌棉田根系与土壤养分的分布特征,选择壤土和砂壤土两种质地土壤,定期调查滴灌棉田不同生育时期的棉花根系与土壤氮磷钾养分在水平和垂直方向的分布规律。结果表明:第一次滴灌水前棉花根系体系构建完成,棉花根系水平分布均匀,在3~20 cm土层垂直分布较多,疏松土壤中可深入到40 cm土层;根系分布与基肥分布吻合,基肥能被有效利用。各生育期棉田养分垂直方向分布总体规律是0~30 cm土层中有效氮磷钾养分分布一致且较高;30~40 cm土层中养分略低,是过渡层;40 cm以下土层中养分较低。0~30 cm土层与40~60 cm土层养分间差异显著。棉田在垂直滴灌带的水平方向土壤养分含量差异不显著;滴肥后0~30 cm土层氮磷钾养分增加明显,及时提供了棉花生长的养分,维持了土层中养分水平。
為瞭解滴灌棉田根繫與土壤養分的分佈特徵,選擇壤土和砂壤土兩種質地土壤,定期調查滴灌棉田不同生育時期的棉花根繫與土壤氮燐鉀養分在水平和垂直方嚮的分佈規律。結果錶明:第一次滴灌水前棉花根繫體繫構建完成,棉花根繫水平分佈均勻,在3~20 cm土層垂直分佈較多,疏鬆土壤中可深入到40 cm土層;根繫分佈與基肥分佈吻閤,基肥能被有效利用。各生育期棉田養分垂直方嚮分佈總體規律是0~30 cm土層中有效氮燐鉀養分分佈一緻且較高;30~40 cm土層中養分略低,是過渡層;40 cm以下土層中養分較低。0~30 cm土層與40~60 cm土層養分間差異顯著。棉田在垂直滴灌帶的水平方嚮土壤養分含量差異不顯著;滴肥後0~30 cm土層氮燐鉀養分增加明顯,及時提供瞭棉花生長的養分,維持瞭土層中養分水平。
위료해적관면전근계여토양양분적분포특정,선택양토화사양토량충질지토양,정기조사적관면전불동생육시기적면화근계여토양담린갑양분재수평화수직방향적분포규률。결과표명:제일차적관수전면화근계체계구건완성,면화근계수평분포균균,재3~20 cm토층수직분포교다,소송토양중가심입도40 cm토층;근계분포여기비분포문합,기비능피유효이용。각생육기면전양분수직방향분포총체규률시0~30 cm토층중유효담린갑양분분포일치차교고;30~40 cm토층중양분략저,시과도층;40 cm이하토층중양분교저。0~30 cm토층여40~60 cm토층양분간차이현저。면전재수직적관대적수평방향토양양분함량차이불현저;적비후0~30 cm토층담린갑양분증가명현,급시제공료면화생장적양분,유지료토층중양분수평。
In this study the distribution of horizontal and vertical direction root and nutrients in loam and sandy loam soil during various cotton planting periods were investigated. The results indicated that cotton root system had been constructed before the first watering, which was well horizontal distributed and distributed vertically most in 3~20 cm soil layer, it could reach 40 cm soil layer in loose soil. The distributions of root and base fertilizer were click and so fertilizer could be used effectively. The gen-eral rules of vertical distribution of cotton nutrient in each growth showed that the distributions of available nitrogen, phosphorus and potassium in 0~30 cm were similar and the highest, and getting slightly lower in 30~40 cm soil, which was a transition lay-er. Below 40 cm soil nutrient the contents of available nitrogen, phosphorus and potassium were very low. The difference be-tween the 0~30 cm layer and 40~60 cm layer of nutrient was significant. Differences in soil nutrient contents in normal direction of drip-irrigation were not significant. After fertilization with drip irrigation, nitrogen, phosphorus and potassium in 0~30 cm soil were significantly increased, which provided nutrients for cotton growth and maintained the soil nutrient level.