Bài viết Điều tra sản phẩm và phụ phẩm nông nghiệp sử dụng làm nguồn chất xơ cho gia súc nhai lại tại tỉnh Phitsanulok, Thái Lan trình bày: Mục đích của nghiên cứu này là khai thác và đánh giá giá trị dinh dưỡng các sản phẩm và phụ phẩm nông nghiệp thuộc các huyện MuangPhitsanulok (MP), Nern-Maprang (NM) và Nakhon-Thai (NT), tỉnh Phitsanulok. Các mẫu câu hỏi và mẫu thức ăn được thu thập ở 362 trang trại,. . | J. Sci. & Devel. 2016, Vol. 14, No. 1: 87-92 Tạp chí Khoa học và Phát triển 2016, tập 14, số 1: 87-92 A SURVEY ON SOURCE OF AGRICULTURAL PRODUCT AND BY-PRODUCT IN PHITSANULOK PROVINCE FOR UTILIZATION AS ROUGHAGE FOR RUMINANT N. Laorodphan, T. Sangseeda, D. Sang-arun, J. Tepsutin, S. Yaemkong, P. Rattanapradit Faculty of Food and Agricultural Technology, PibulsongkramRajabhat University, Phitsanulok Province Email*: naikaset119@ Received date: Accepted date: ABSTRACT The purposes of this research were to explore the source of product and by-product from agricultural and to evaluate chemical composition of agricultural by-product in Muang Phitsanulok (MP), Nern-Maprang (NM) and Nakhon-Thai (NT) districts, Phitsanulok Province. The purposive samples used by a questionnaire and surveying were 362 farmers. The data was statistically analysed by using a linear model that considered all factors as fixed effects. Least squares means for subclasses of each factor were estimated and they were compared using t-tests. In addition, the agricultural product and by-product were collected from surveying area and was analysed for chemical composition by AOAC method. The results revealed that cultivating area (CA), average yield (AY), and average byproduct (AP) were affected by farm location-source of by-product (p > ). Farmers from MP district had the higher CA, AY, and AP from rice than NT and NP districts, respectively, except for CA from NP and NT districts, respectively. In contrast farmers from NP district had higher AY, and AP from corn than NT and MP districts, respectively, except for CA from NT district. Chemical analysing results showed that the chemical composition of corn stover, corn foliage and rice straw consisted of dry matter , , and ; ash , , and ; crude protein , , and ; crude fat , , and ; and crude fiber , , and , .