HYDRAULIC LIFT AND SOIL NUTRIENT HETEROGENEITY

被引：19

作者：

CALDWELL, MM ^{[1
]}

MANWARING, JH ^{[1
]}

机构：

[1] UTAH STATE UNIV,CTR ECOL,LOGAN,UT 84322

来源：

ISRAEL JOURNAL OF PLANT SCIENCES | 1994年 / 42卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1080/07929978.1994.10676583

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Water released at night from roots into upper portions of the soil profile in the process of hydraulic lift may contribute to reducing spatial soil nutrient heterogeneity. A manipulative field experiment was conducted in a semiarid shrub stand to determine if circumvention of hydraulic lift, by nighttime illumination of the shrub canopy, would result in greater soil nutrient heterogeneity than if the hydraulic lift process was allowed to operate. Nutrient-enriched patches were superimposed on the existing soil heterogeneity and after 40 days, the patches and interspaces were sampled for ions of different mobility and for root mass. There was no indication under these conditions that hydraulic lift was contributing to smoothing spatial nutrient heterogeneity.

引用

页码：321 / 330

页数：10

共 23 条

[1]

[Anonymous], 1983, EPA600479020

[2]

[Anonymous], 1970, TECHN INT C ADV AUT

[3]

BARBER SA, 1974, SOIL NUTRIENT BIOAVA

[4]

Caldwell M. M., 1986, On the economy of plant form and function, P251

[5]

Caldwell M. M., 1991, Plant root growth: an ecological perspective., P423

[6]

Caldwell M.M., 1994, ECOPHYSIOLOGICAL PRO, P325, DOI [10.1016/B978-0-12-155070-7.50017-2., DOI 10.1016/B978-0-12-155070-7.50017-2, 10.1016/B978-0-12-155070-7.50017-2]

[7] COPING WITH HERBIVORY - PHOTOSYNTHETIC CAPACITY AND RESOURCE-ALLOCATION IN 2 SEMI-ARID AGROPYRON BUNCHGRASSES [J].

CALDWELL, MM ;

RICHARDS, JH ;

JOHNSON, DA ;

NOWAK, RS ;

DZUREC, RS .

OECOLOGIA, 1981, 50 (01) :14-24

[8] HYDRAULIC LIFT - WATER EFFLUX FROM UPPER ROOTS IMPROVES EFFECTIVENESS OF WATER-UPTAKE BY DEEP ROOTS [J].

CALDWELL, MM ;

RICHARDS, JH .

OECOLOGIA, 1989, 79 (01) :1-5

[9] HYDRAULIC LIFT AND WATER-USE BY PLANTS - IMPLICATIONS FOR WATER-BALANCE, PERFORMANCE AND PLANT-PLANT INTERACTIONS [J].

DAWSON, TE .

OECOLOGIA, 1993, 95 (04) :565-574

[10]

Grime J. P., 1994, EXPLOITATION ENV HET, P1

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