Foliar diagnosis of sugar cane - variation of leaf potassium value with age of cane and rainfall regime

Code (CO)	MSI99P0152
Author (AU)	Ng Kee Kwong, K. F. Gauthier, J. Deville, J.
Title - English (ET)	Foliar diagnosis of sugar cane - variation of leaf potassium value with age of cane and rainfall regime
Document Type(DT)	Periodical article
Date of publication (DP)	1990
Series (SE)	Proc. S. Afr. Sug. Technol. Ass.
Source (SO)	64: 22-25
Language of text (LT)	En
Language of summaries (LS)	En
Abstract (AB)	The potassium (K) content of top visible dewlap leaves of sugarcane ratoons in Mauritius varies in an irregular manner with age of cane. However, by increasing the number of leaf samplings, the fluctuation of the mean K values with age becomes less and less significant. As a result the running average leaf K concentration during three consecutive years of double leaf sampling is used to assess the K status of the crop. In these circumstances corrections to the analytical leaf K values for crop age do not have a noteworthy impact on the accuracy of foliar diagnosis for K status. Examinations of daily rainfall received 30 days prior to leaf sampling failed to show the significance of moisture regime on the K nutritional status of sugarcane. In some instances a high rainfall prior to leaf sampling gave rise to a high leaf K value while in other instances at the same site the opposite was true.
Descriptors - English (DE)	SUGARCANE FOLIAR DIAGNOSIS POTASSIUM PLANT NUTRITION
Descriptors - Geographic (DG)	MAURITIUS
Sort Key 1(K1)	Sugarcane: soils and plant nutrition
Sort Key 2 (K2)	Techniques: foliar diagnosis
Call Number (CN)	633.61
Date record entered (DA)	1992-02-11
Language of analysis (LA)	En
Affiliation (AF)	Mauritius Sugar Industry Research Institute
Location (LO)	LIB
Processing status (PS)	CAT
Number of copies (NC)	1
MSIRI Staff (MS)	CHEM